Corporate houses need strong PR wings

As lack of access to information hampers proper news coverage, speakers at a workshop in Dhaka yesterday called for setting up of strong public relations wings in corporate houses.

They also said the companies should practise corporate social responsibility (CSR) for their sustainable development.

They were speaking at the workshop organised by Management and Resources Development Initiative (MRDI) with support from Manusher Jonno. Representatives from banks, insurance, telecommunication, real estate companies, chambers and print and electronic media took part in the workshop.

One-month newspaper content analysis, assessment of newspaper gatekeepers and corporate sector, and findings derived from three roundtables were presented in the workshop moderated by Moazzem Hossain, editor of The Financial Express.

Dewan Sultan Ahmed, vice president of Federation of Bangladesh Chambers of Commerce and Industry (FBCCI), said governance in the state level is a pre-condition for ensuring governance in corporate houses.

Sadat Hossain Salim, managing director of Anwar Landmark Ltd, said media should also be governed by ethics and guidelines when it comes to publishing advertisements.

Farid Hossain, bureau chief of Associated Press (AP), said business reports lack depth and news value. He also said some advertisements, especially in electronic media, are destroying the country's social values.

Syed Yamin Bakht, general manager (information) of GrameenPhone Ltd, said local business news gets less coverage in media. He also said if the corporate PR wings influence news coverage, it is the failure on the part of the newspapers.

Lopa Rahman, senior research fellow of Bangladesh Enterprise Institute (BEI), said CSR is not charity. Companies should continue with CSR activity, it is not one-off assistance, she added.

Nasir A. Chowdhury, managing director and CEO of Green Delta Insurance Ltd, said journalists need training for better corporate news coverage.

Mohd Sanaullah, company secretary of Singer Bangladesh Ltd, said recently launched Securities and Exchange Commission (SEC) guidelines will help companies ensure corporate governance.

Pranab Saha, chief reporter of the Prothom Alo, said company press releases should be more informative for better coverage.

Mustak Hossain, manager of corporate affairs of Ranks Telecom Ltd, said the corporate houses should undertake issue-based training for journalists in collaboration with journalists' forum and associations.

Corporate houses need strong PR wings

As lack of access to information hampers proper news coverage, speakers at a workshop in Dhaka yesterday called for setting up of strong public relations wings in corporate houses.

They also said the companies should practise corporate social responsibility (CSR) for their sustainable development.

They were speaking at the workshop organised by Management and Resources Development Initiative (MRDI) with support from Manusher Jonno. Representatives from banks, insurance, telecommunication, real estate companies, chambers and print and electronic media took part in the workshop.

One-month newspaper content analysis, assessment of newspaper gatekeepers and corporate sector, and findings derived from three roundtables were presented in the workshop moderated by Moazzem Hossain, editor of The Financial Express.

Dewan Sultan Ahmed, vice president of Federation of Bangladesh Chambers of Commerce and Industry (FBCCI), said governance in the state level is a pre-condition for ensuring governance in corporate houses.

Sadat Hossain Salim, managing director of Anwar Landmark Ltd, said media should also be governed by ethics and guidelines when it comes to publishing advertisements.

Farid Hossain, bureau chief of Associated Press (AP), said business reports lack depth and news value. He also said some advertisements, especially in electronic media, are destroying the country's social values.

Syed Yamin Bakht, general manager (information) of GrameenPhone Ltd, said local business news gets less coverage in media. He also said if the corporate PR wings influence news coverage, it is the failure on the part of the newspapers.

Lopa Rahman, senior research fellow of Bangladesh Enterprise Institute (BEI), said CSR is not charity. Companies should continue with CSR activity, it is not one-off assistance, she added.

Nasir A. Chowdhury, managing director and CEO of Green Delta Insurance Ltd, said journalists need training for better corporate news coverage.

Mohd Sanaullah, company secretary of Singer Bangladesh Ltd, said recently launched Securities and Exchange Commission (SEC) guidelines will help companies ensure corporate governance.

Pranab Saha, chief reporter of the Prothom Alo, said company press releases should be more informative for better coverage.

Mustak Hossain, manager of corporate affairs of Ranks Telecom Ltd, said the corporate houses should undertake issue-based training for journalists in collaboration with journalists' forum and associations.

Nature

Nature, in the broadest sense, is equivalent to the natural world, physical world, or material world. "Nature" refers to the phenomena of the physical world, and also to life in general. It ranges in scale from the subatomic to the cosmic.

The word nature is derived from the Latin word natura, or "essential qualities, innate disposition", and literally means "birth".[1] Natura was a Latin translation of the Greek word physis (φύσις), which originally related to the intrinsic characteristics that plants, animals, and other features of the world develop of their own accord.[2][3] The concept of nature as a whole, the physical universe, is one of several expansions of the original notion; it began with certain core applications of the word φύσις by pre-Socratic philosophers, and has steadily gained currency ever since. This usage was confirmed during the advent of modern scientific method in the last several centuries.[4][5]

Within the various uses of the word today, "nature" may refer to the general realm of various types of living plants and animals, and in some cases to the processes associated with inanimate objects–the way that particular types of things exist and change of their own accord, such as the weather and geology of the Earth, and the matter and energy of which all these things are composed. It is often taken to mean the "natural environment" or wilderness–wild animals, rocks, forest, beaches, and in general those things that have not been substantially altered by human intervention, or which persist despite human intervention. For, example, manufactured objects and human interaction generally are not considered part of nature, unless qualified as, for example, "human nature" or "the whole of nature". This more traditional concept of natural things which can still be found today implies a distinction between the natural and the artificial, with the artificial being understood as that which has been brought into being by a human consciousness or a human mind. Depending on the particular context, the term "natural" might also be distinguished from the unnatural, the supernatural, and the artifactual.Earth
Main articles: Earth, Earth science, Structure of the Earth, Plate tectonics, and Geology

View of Earth, taken in 1972 by the Apollo 17 crew. This image is the only photograph of its kind to date, showing a fully sunlit hemisphere of the Earth.

Earth (or, "the earth") is the only planet presently known to support life, and as such, its natural features are the subject of many fields of scientific research. Within the solar system, it is third nearest to the sun; it is the largest terrestrial planet and the fifth largest overall. Its most prominent climatic features are its two large polar regions, two relatively narrow temperate zones, and a wide equatorial tropical to subtropical region.[6] Precipitation varies widely with location, from several metres of water per year to less than a millimetre. About 70 percent of the surface is covered by salt-water oceans. The remainder consists of continents and islands, with most of the inhabited land in the Northern Hemisphere.

Earth has evolved through geological and biological processes that have left traces of the original conditions. The outer surface is divided into several gradually migrating tectonic plates, which have changed relatively quickly several times. The interior remains active, with a thick layer of molten mantle and an iron-filled core that generates a magnetic field.

The atmospheric conditions have been significantly altered from the original conditions by the presence of life-forms,[7] which create an ecological balance that stabilizes the surface conditions. Despite the wide regional variations in climate by latitude and other geographic factors, the long-term average global climate is quite stable during interglacial periods,[8] and variations of a degree or two of average global temperature have historically had major effects on the ecological balance, and on the actual geography of the Earth.[9][10]
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Historical perspective
Main articles: History of Earth and Evolution

Phylum Pediastrumboryanum. Plankton have existed on Earth for at least 2 billion years.[11]

Earth is estimated to have formed 4.55 billion years ago from the solar nebula, along with the Sun and other planets.[12] The moon formed roughly 20 million years later. Initially molten, the outer layer of the planet cooled, resulting in the solid crust. Outgassing and volcanic activity produced the primordial atmosphere. Condensing water vapor, most or all of which came from ice delivered by comets, produced the oceans and other water sources.[13] The highly energetic chemistry is believed to have produced a self-replicating molecule around 4 billion years ago.[14]

Continents formed, then broke up and reformed as the surface of Earth reshaped over hundreds of millions of years, occasionally combining to make a supercontinent. Roughly 750 million years ago, the earliest known supercontinent Rodinia, began to break apart. The continents later recombined to form Pannotia which broke apart about 540 million years ago, then finally Pangaea, which broke apart about 180 million years ago.[15]

Land-based plants and fungi have been part of nature on Earth for about the past 400 million years. These have needed to adapt and move many times as the continents and climates changed.[16][17]

There is significant evidence, still being discussed among scientists, that a severe glacial action during the Neoproterozoic era covered much of the planet in a sheet of ice. This hypothesis has been termed the "Snowball Earth", and it is of particular interest as it precedes the Cambrian explosion in which multicellular life forms began to proliferate about 530–540 million years ago.[18]

Since the Cambrian explosion there have been five distinctly identifiable mass extinctions.[19] The last mass extinction occurred some 65 million years ago, when a meteorite collision probably triggered the extinction of the non-avian dinosaurs and other large reptiles, but spared small animals such as mammals, which then resembled shrews. Over the past 65 million years, mammalian life diversified.[20]

Several million years ago, a species of small African ape gained the ability to stand upright.[21] The subsequent advent of human life, and the development of agriculture and further civilization allowed humans to affect the Earth more rapidly than any previous life form, affecting both the nature and quantity of other organisms as well as global climate. By comparison, the oxygen catastrophe, produced by the proliferation of algae during the Siderian period, required about 300 million years to culminate.)

The present era is classified as part of a mass extinction event, the Holocene extinction event, the fastest ever to have occurred.[22][23] Some, such as E. O. Wilson of Harvard University, predict that human destruction of the biosphere could cause the extinction of one-half of all species in the next 100 years.[24] The extent of the current extinction event is still being researched, debated and calculated by biologists.[25]
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Geology
Main article: Geology

Three types of plate boundary.

Geology (from Greek: γη, gê, "earth"; and λόγος, logos, "speech" lit. to talk about the earth) is the science and study of the solid and liquid matter that constitutes the Earth. The field of geology encompasses the study of the composition, structure, physical properties, dynamics, and history of Earth materials, and the processes by which they are formed, moved, and changed. The field is a major academic discipline, and is also important for mineral and hydrocarbon extraction, knowledge about and mitigation of natural hazards, some engineering fields, and understanding past climates and environments.
[edit]
Geological evolution of an area

The geology of an area evolves through time as rock units are deposited and inserted and deformational processes change their shapes and locations.

Rock units are first emplaced either by deposition onto the surface or intrude into the overlying rock. Deposition can occur when sediments settle onto the surface of the Earth and later lithify into sedimentary rock, or when as volcanic material such as volcanic ash or lava flows, blanket the surface. Igneous intrusions such as batholiths, laccoliths, dikes, and sills, push upwards into the overlying rock, and crystallize as they intrude.

After the initial sequence of rocks has been deposited, the rock units can be deformed and/or metamorphosed. Deformation typically occurs as a result of horizontal shortening, horizontal extension, or side-to-side (strike-slip) motion. These structural regimes broadly relate to convergent boundaries, divergent boundaries, and transform boundaries, respectively, between tectonic plates.
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Atmosphere, climate, and weather

A supercell thunderstorm.
Main articles: Earth's atmosphere, Climate, and Weather

The atmosphere of the Earth serves as a key factor in sustaining the planetary ecosystem. The thin layer of gases that envelops the Earth is held in place by the planet's gravity. Dry air consists of 78% nitrogen, 21% oxygen, 1% argon and other inert gases, carbon dioxide, etc.; but air also contains a variable amount of water vapor. The atmospheric pressure declines steadily with altitude, and has a scale height of about 8 kilometres at the Earth's surface: the height at which the atmospheric pressure has declined by a factor of e (a mathematical constant equal to 2.71...).[26][27] The ozone layer of the Earth's atmosphere plays an important role in depleting the amount of ultraviolet (UV) radiation that reaches the surface. As DNA is readily damaged by UV light, this serves to protect life at the surface. The atmosphere also retains heat during the night, thereby reducing the daily temperature extremes.

Terrestrial weather occurs almost exclusively in the lower part of the atmosphere, and serves as a convective system for redistributing heat. Ocean currents are another important factor in determining climate, particularly the major underwater thermohaline circulation which distributes heat energy from the equatorial oceans to the polar regions. These currents help to moderate the differences in temperature between winter and summer in the temperate zones. Also, without the redistributions of heat energy by the ocean currents and atmosphere, the tropics would be much hotter, and the polar regions much colder.

Weather can have both beneficial and harmful effects. Extremes in weather, such as tornadoes or hurricanes and cyclones, can expend large amounts of energy along their paths, and produce devastation. Surface vegetation has evolved a dependence on the seasonal variation of the weather, and sudden changes lasting only a few years can have a dramatic effect, both on the vegetation and on the animals dependent on its growth for their food.

A tornado in central Oklahoma.

The planetary climate is a measure of the long-term trends in the weather. Various factors are known to influence the climate, including ocean currents, surface albedo, greenhouse gases, variations in the solar luminosity, and changes to the planet's orbit. Based on historical records, the Earth is known to have undergone drastic climate changes in the past, including ice ages.

The climate of a region depends on a number of factors, especially latitude. A latitudinal band of the surface with similar climatic attributes forms a climate region. There are a number of such regions, ranging from the tropical climate at the equator to the polar climate in the northern and southern extremes. Weather is also influenced by the seasons, which result from the Earth's axis being tilted relative to its orbital plane. Thus, at any given time during the summer or winter, one part of the planet is more directly exposed to the rays of the sun. This exposure alternates as the Earth revolves in its orbit. At any given time, regardless of season, the northern and southern hemispheres experience opposite seasons.

Weather is a chaotic system that is readily modified by small changes to the environment, so accurate weather forecasting is currently limited to only a few days. Overall, two things are currently happening worldwide: (1) temperature is increasing on the average; and (2) regional climates have been undergoing noticeable changes.[28]
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Oceans, lakes, and rivers
Main articles: Ocean, Lake, and River
[edit]
Oceans

A view of the Atlantic ocean from Leblon, Rio de Janeiro.Earth's oceans
(World Ocean)
Arctic Ocean
Atlantic Ocean
Indian Ocean
Pacific Ocean
Southern Ocean


An ocean is a major body of saline water, and a principal component of the hydrosphere. Approximately 71% of the Earth's surface (an area of some 361 million square kilometers) is covered by ocean, a continuous body of water that is customarily divided into several principal oceans and smaller seas. More than half of this area is over 3,000 meters (9,800 ft) deep. Average oceanic salinity is around 35 parts per thousand (ppt) (3.5%), and nearly all seawater has a salinity in the range of 30 to 38 ppt. Though generally recognized as several 'separate' oceans, these waters comprise one global, interconnected body of salt water often referred to as the World Ocean or global ocean.[29][30] This concept of a global ocean as a continuous body of water with relatively free interchange among its parts is of fundamental importance to oceanography.[31]

The major oceanic divisions are defined in part by the continents, various archipelagos, and other criteria: these divisions are (in descending order of size) the Pacific Ocean, the Atlantic Ocean, the Indian Ocean, the Southern Ocean (which is sometimes subsumed as the southern portions of the Pacific, Atlantic, and Indian Oceans), and the Arctic Ocean (which is sometimes considered a sea of the Atlantic). The Pacific and Atlantic may be further subdivided by the equator into northerly and southerly portions. Smaller regions of the oceans are called seas, gulfs, bays and other names. There are also salt lakes, which are smaller bodies of landlocked saltwater that are not interconnected with the World Ocean. Two notable examples of salt lakes are the Aral Sea and the Great Salt Lake.
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Lakes

The Lácar Lake is a lake of glacial origin in the province of Neuquén, Argentina.

A lake (from Latin lacus) is a terrain feature (or physical feature), a body of liquid on the surface of a world that is localized to the bottom of basin (another type of landform or terrain feature; that is, it is not global) and moves slowly if it moves at all. On Earth, a body of water is considered a lake when it is inland, not part of the ocean, is larger and deeper than a pond, and is fed by a river.[32][33] The only world other than Earth known to harbor lakes is Titan, Saturn's largest moon, which has lakes of ethane, most likely mixed with methane. It is not known if Titan's lakes are fed by rivers, though Titan's surface is carved by numerous river beds. Natural lakes on Earth are generally found in mountainous areas, rift zones, and areas with ongoing or recent glaciation. Other lakes are found in endorheic basins or along the courses of mature rivers. In some parts of the world, there are many lakes because of chaotic drainage patterns left over from the last Ice Age. All lakes are temporary over geologic time scales, as they will slowly fill in with sediments or spill out of the basin containing them.
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Rivers

Macal River in Belize at San Ignacio, in November, 2001.

A river is a natural watercourse, usually freshwater, flowing toward an ocean, a lake, a sea or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including stream, creek, brook, rivulet, and rill; there is no general rule that defines what can be called a river. Many names for small rivers are specific to geographic location; one example is Burn in Scotland and North-east England. Sometimes a river is said to be larger than a creek,[34] but this is not always the case, due to vagueness in the language.[35] A river is part of the hydrological cycle. Water within a river is generally collected from precipitation through surface runoff, groundwater recharge, springs, and the release of stored water in natural ice and snowpacks (i.e., from glaciers).
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Ecosystems

Loch Lomond in Scotland forms a relatively isolated ecosystem. The fish community of this lake has remained unchanged over a very long period of time.[36]
Main articles: Ecology and Ecosystem

All forms of life interact with the environment in which they exist, and also with other life forms. In the 20th century this premise gave rise to the concept of ecosystems, which can be defined as any situation where there is interaction between organisms and their environment.

Ecosystems are composed of a variety of abiotic and biotic components that function in an interrelated way.[37] The structure and composition is determined by various environmental factors that are interrelated. Variations of these factors will initiate dynamic modifications to the ecosystem. Some of the more important components are: soil, atmosphere, radiation from the sun, water, and living organisms.

Each living organism has a continual relationship with every other element that makes up its environment. Within the ecosystem, species are connected and dependent upon one another in the food chain, and exchange energy and matter between themselves as well as with their environment.[38]

An aerial view of a human ecosystem. Pictured is the city of Chicago

Every species has limits of tolerance to factors that affect its survival, reproductive success and ability to continue to thrive and interact sustainably with the rest of its environment, which in turn may have effects on these factors for many other species or even on the whole of life.[39] The concept of an ecosystem is thus an important subject of study, as such study provides information needed to make decisions about how human life may interact in a way that allows the various ecosystems to be sustained for future use rather than used up or otherwise rendered ineffective. For the purpose of such study, a unit of smaller size is called a microecosystem. For example, an ecosystem can be a stone and all the life under it. A macroecosystem might involve a whole ecoregion, with its drainage basin.[40]

The following ecosystems are examples of the kinds currently under intensive study:
oceanic ecosystems,
"continental ecosystems", such as "forest ecosystems", "meadow ecosystems" such as steppes or savannas), or agro-ecosystems,
systems in inland waters, such as lentic ecosystem"s such as lakes or ponds; or lotic ecosystems such as rivers.

Another classification can be made by reference to its communities, such as in the case of a human ecosystem. Regional groupings of distinctive plant and animals best adapted to the region's physical natural environment, latitude, altitude, and terrain are known as biomes. The broadest classification, today under wide study and analysis, and also subject to widespread arguments about its nature and validity, is that of the entire sum of life seen as analogous to a self-sustaining organism; a theory studied as earth system science (less formally known as Gaia theory).[41][42]
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Wilderness

The Daintree Rainforest, a wilderness area in Queensland, Australia
Main articles: Wilderness and Natural environment

Wilderness is generally defined as a natural environment on Earth that has not been significantly modified by human activity. The WILD Foundation goes into more detail, defining wilderness as: "The most intact, undisturbed wild natural areas left on our planet - those last truly wild places that humans do not control and have not developed with roads, pipelines or other industrial infrastructure." Wilderness areas and protected parks are considered important for the survival of certain species, ecological studies, conservation, solitude, and recreation. Wilderness is deeply valued for cultural, spiritual, moral, and aesthetic reasons. Some nature writers believe wilderness areas are vital for the human spirit and creativity.[43] Ecologists consider wilderness areas to be an integral part of the planet's self-sustaining natural ecosystem (the biosphere).

Wilderness areas can be found in preserves, estates, farms, conservation preserves, ranches, National Forests, National Parks and even in urban areas along rivers, gulches or otherwise undeveloped areas. These areas are considered important for the survival of certain species, biodiversity, ecological studies, conservation, solitude, and recreation. Wilderness is deeply valued for cultural, spiritual, moral, and aesthetic reasons. Some nature writers believe wilderness areas are vital for the human spirit and creativity.[43] They may also preserve historic genetic traits and that they provide habitat for wild flora and fauna that may be difficult to recreate in zoos, arboretums or laboratories.
[edit]
Life
Main articles: Life, Life science, and Biosphere

Female mallard and ducklings - reproduction is essential for continuing life

Although there is no universal agreement on the definition of life, scientists generally accept that the biological manifestation of life is characterized by organization, metabolism, growth, adaptation, response to stimuli and reproduction.[44] Life may also be said to be simply the characteristic state of organisms.

Properties common to terrestrial organisms (plants, animals, fungi, protists, archaea and bacteria) are that they are cellular, carbon-and-water-based with complex organization, having a metabolism, a capacity to grow, respond to stimuli, and reproduce. An entity with these properties is generally considered life. However, not every definition of life considers all of these properties to be essential. Human-made analogs of life may also be considered to be life.

The biosphere is the part of Earth's outer shell – including air, land, surface rocks and water – within which life occurs, and which biotic processes in turn alter or transform. From the broadest geophysiological point of view, the biosphere is the global ecological system integrating all living beings and their relationships, including their interaction with the elements of the lithosphere (rocks), hydrosphere (water), and atmosphere (air). Currently the entire Earth contains over 75 billion tons (150 trillion pounds or about 6.8 x 1013 kilograms) of biomass (life), which lives within various environments within the biosphere.[45]

Over nine-tenths of the total biomass on Earth is plant life, on which animal life depends very heavily for its existence.[46] More than 2 million species of plant and animal life have been identified to date,[47] and estimates of the actual number of existing species range from several million to well over 50 million.[48][49][50] The number of individual species of life is constantly in some degree of flux, with new species appearing and others ceasing to exist on a continual basis.[51][52] The total number of species is presently in rapid decline.[53][54][55]
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Evolution

Amazon Rainforest in Brazil. The tropical rainforests of South America contain the largest diversity of species on Earth, with new species of plants and animals evolving from existing species on a frequent basis.[56][57]
Main article: Evolution

Life, as it is currently understood, is only known to exist on the planet Earth. The origin of life is still a poorly understood process, but it is thought to have occurred about 3.9 to 3.5 billion years ago during the hadean or archean eons on a primordial earth that had a substantially different environment than is found at present.[58] These life forms possessed the basic traits of self-replication and inheritable traits. Once life had appeared, the process of evolution by natural selection resulted in the formation of ever-more diverse life forms.

Species that were unable to adapt to the changing environment and competition from other life forms became extinct. However, the fossil record retains evidence of many of these older species. Current fossil and DNA evidence shows that all existing species can trace a continual ancestry back to the first primitive life forms.[58]

The advent of photosynthesis in very basic forms of plant life worldwide allowed the sun's energy to be harvested to create conditions allowing for more complex life. The resultant oxygen accumulated in the atmosphere and gave rise to the ozone layer. The incorporation of smaller cells within larger ones resulted in the development of yet more complex cells called eukaryotes.[59] Cells within colonies became increasingly specialized, resulting in true multicellular organisms. With the ozone layer absorbing harmful ultraviolet radiation, life colonized the surface of Earth.
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Microbes

A microscopic mite Lorryia formosa.
Main article: Microbe

The first form of life to develop on the Earth were microbes, and they remained the only form of life on the planet until about a billion years ago when multi-cellular organisms began to appear.[60] Microorganisms are single-celled organisms that are generally microscopic, and smaller than the human eye can see. They include Bacteria, Fungi, Archaea and Protista.

These life forms are found in almost every location on the Earth where there is liquid water, including the interior of rocks within the planet.[61] Their reproduction is both rapid and profuse. The combination of a high mutation rate and a horizontal gene transfer[62] ability makes them highly adaptable, and able to survive in new environments, including outer space.[63] They form an essential part of the planetary ecosystem. However some microorganisms are pathogenic and can post health risk to other organisms.
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Plants and animals
Main articles: Plant and Animal
See also: Botany, Fauna, and Biology

A confluence of "natural" and a "made" environment

The distinction between plant and animal life is not sharply drawn, with some categories of life that stand between or across the two. Originally Aristotle divided all living things between plants, which generally do not move, and animals. In Linnaeus' system, these became the kingdoms Vegetabilia (later Plantae) and Animalia. Since then, it has become clear that the Plantae as originally defined included several unrelated groups, and the fungi and several groups of algae were removed to new kingdoms. However, these are still often considered plants in many contexts. Bacterial life is sometimes included in flora,[64][65] and some classifications use the term bacterial flora separately from plant flora.

Among the many ways of classifying plants are by regional floras, which, depending on the purpose of study, can also include fossil flora, remnants of plant life from a previous era. People in many regions and countries take great pride in their individual arrays of characteristic flora, which can vary widely across the globe due to differences in climate and terrain.

Wildebeest in Ngorongoro Conservation Area, Tanzania. Note the tendency to congregate, one of nature's displays of what is sometimes called the herding instinct or herd behavior.

Regional floras commonly are divided into categories such as native flora and agricultural and garden flora, the lastly mentioned of which are intentionally grown and cultivated. Some types of "native flora" actually have been introduced centuries ago by people migrating from one region or continent to another, and become an integral part of the native, or natural flora of the place to which they were introduced. This is an example of how human interaction with nature can blur the boundary of what is considered nature.

Another category of plant has historically been carved out for weeds. Though the term has fallen into disfavor among botanists as a formal way to categorize "useless" plants, the informal use of the word "weeds" to describe those plants that are deemed worthy of elimination is illustrative of the general tendency of people and societies to seek to alter or shape the course of nature. Similarly, animals are often categorized in ways such as domestic, farm animals, wild animals, pests, etc. according to their relationship to human life.

Animals as a category have several characteristics that generally set them apart from other living things, though not traced by scientists to having legs or wings instead of roots and leaves. Animals are eukaryotic and usually multicellular (although see Myxozoa), which separates them from bacteria, archaea and most protists. They are heterotrophic, generally digesting food in an internal chamber, which separates them from plants and algae. They are also distinguished from plants, algae, and fungi by lacking cell walls.

With a few exceptions, most notably the sponges (Phylum Porifera), animals have bodies differentiated into separate tissues. These include muscles, which are able to contract and control locomotion, and a nervous system, which sends and processes signals. There is also typically an internal digestive chamber. The eukaryotic cells possessed by all animals are surrounded by a characteristic extracellular matrix composed of collagen and elastic glycoproteins. This may be calcified to form structures like shells, bones, and spicules, a framework upon which cells can move about and be reorganized during development and maturation, and which supports the complex anatomy required for mobility.
[edit]
Human interrelationship

Despite their natural beauty, the secluded valleys along the Na Pali Coast in Hawaii are heavily modified by introduced invasive species such as She-oak.

Although humans currently comprise only a minuscule proportion of the total living biomass on Earth, the human effect on nature is disproportionately large. Because of the extent of human influence, the boundaries between what humans regard as nature and "made environments" is not clear cut except at the extremes. Even at the extremes, the amount of natural environment that is free of discernible human influence is presently diminishing at an increasingly rapid pace.

The development of technology by the human race has allowed the greater exploitation of natural resources and has helped to alleviate some of the risk from natural hazards. In spite of this progress, however, the fate of human civilization remains closely linked to changes in the environment. There exists a highly complex feedback loop between the use of advanced technology and changes to the environment that are only slowly becoming understood.[66] Man-made threats to the Earth's natural environment include pollution, deforestation, and disasters such as oil spills. Humans have contributed to the extinction of many plants and animals.

Humans employ nature for both leisure and economic activities. The acquisition of natural resources for industrial use remains the primary component of the world's economic system. Some activities, such as hunting and fishing, are used for both sustenance and leisure, often by different people. Agriculture was first adopted around the 9th millennium BCE. Ranging from food production to energy, nature influences economic wealth.

Although early humans gathered uncultivated plant materials for food and employed the medicinal properties of vegetation for healing,[67] most modern human use of plants is through agriculture. The clearance of large tracts of land for crop growth has led to a significant reduction in the amount available of forestation and wetlands, resulting in the loss of habitat for many plant and animal species as well as increased erosion.[68]
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Aesthetics and beauty

Salmon fry hatching. The root of the Latin "natura" ("nature") is "natus," from "nasci" ("to be born").[1]

Beauty in nature has long been a common theme in life and in art, and books emphasizing beauty in nature fill large sections of libraries and bookstores. That nature has been depicted and celebrated by so much art, photography, poetry and other literature shows the strength with which many people associate nature and beauty. Why this association exists, and what the association consists of, is studied by the branch of philosophy called aesthetics. Beyond certain basic characteristics that many philosophers agree about to explain what is seen as beautiful, the opinions are virtually endless.[69]

Summer field in Belgium (Hamois). The blue flower is Centaurea cyanus and the red one a Papaver rhoeas.

Looked at through the lens of the visual arts, nature and wildness have been important subjects in various epochs of world history. An early tradition of landscape art began in China during the Tang Dynasty (618-907). The tradition of representing nature as it is became one of the aims of Chinese painting and was a significant influence in Asian art. Artists learned to depict mountains and rivers "from the perspective of nature as a whole and on the basis of their understanding of the laws of nature ... as if seen through the eyes of a bird." In the 13th century, the Song Dynasty artist Shi Erji listed "scenes lacking any places made inaccessible by nature," as one of the 12 things to avoid in painting.[70]

In the Western world the idea of wilderness having intrinsic value emerged in the 1800s, especially in the works of the Romantic movement. British artists John Constable and JMW Turner turned their attention to capturing the beauty of the natural world in their paintings. Before that, paintings had been primarily of religious scenes or of human beings. William Wordsworth's poetry described the wonder of the natural world, which had formerly been viewed as a threatening place. Increasingly the valuing of nature became an aspect of Western culture.[71] This artistic movement also coincided with the Transcendentalist movement in the Western world.

Many scientists, who study nature in more specific and organized ways, also share the conviction that nature is beautiful; the French mathematician, Jules Henri Poincaré (1854–1912) said:

The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful.
If nature were not beautiful, it would not be worth knowing, and if nature were not worth knowing, life would not be worth living. Of course I do not here speak of that beauty which strikes the senses, the beauty of qualities and of appearance; not that I undervalue such beauty, far from it, but it has nothing to do with science; I mean that profounder beauty which comes from the harmonious order of the parts and which a pure intelligence can grasp.[72]

A common classical idea of beautiful art involves the word mimesis, the imitation of nature. Also in the realm of ideas about beauty in nature is that the perfect is implied through symmetry, equal division, and other perfect mathematical forms and notions.
[edit]
Matter and energy

The first few hydrogen atom electron orbitals shown as cross-sections with color-coded probability density
Main articles: Matter and Energy
See also: Chemistry and Physics

Some fields of science see nature as matter in motion, obeying certain laws of nature which science seeks to understand. For this reason the most fundamental science is generally understood to be "physics" – the name for which is still recognizable as meaning that it is the study of nature.

Matter is commonly defined as the substance of which physical objects are composed. It constitutes the observable universe. The visible components of the universe are now believed to compose only 4 percent of the total mass. The remainder is believed to consist of 23 percent cold dark matter and 73 percent dark energy.[73] The exact nature of these components is still unknown and is currently under intensive investigation by physicists.

The behavior of matter and energy throughout the observable universe appears to follow well-defined physical laws. These laws have been employed to produce cosmological models that successfully explain the structure and the evolution of the universe we can observe. The mathematical expressions of the laws of physics employ a set of twenty physical constants[74] that appear to be static across the observable universe.[75] The values of these constants have been carefully measured, but the reason for their specific values remains a mystery.
[edit]
Beyond Earth

NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 56,000 light years in diameter and approximately 60 million light years distant.

The deepest visible-light image of the universe, the Hubble Ultra Deep Field, contains an estimated 10,000 galaxies in a patch of sky just one-tenth the diameter of the full moon. Image Credit: NASA, ESA, S. Beckwith (STScI) and the HUDF team.
Main articles: Outer space, Universe, and Extraterrestrial life

Outer space, also simply called space, refers to the relatively empty regions of the universe outside the atmospheres of celestial bodies. Outer space is used to distinguish it from airspace (and terrestrial locations). There is no discrete boundary between the Earth's atmosphere and space, as the atmosphere gradually attenuates with increasing altitude. Outer space within the solar system is called interplanetary space, which passes over into interstellar space at what is known as the heliopause.

Outer space is certainly spacious, but it is far from empty. Outer space is sparsely filled with several dozen types of organic molecules discovered to date by microwave spectroscopy, blackbody radiation left over from the big bang and the origin of the universe, and cosmic rays, which include ionized atomic nuclei and various subatomic particles. There is also some gas, plasma and dust, and small meteors. Additionally, there are signs of human life in outer space today, such as material left over from previous manned and unmanned launches which are a potential hazard to spacecraft. Some of this debris re-enters the atmosphere periodically.

Although the planet Earth is currently the only known body within the solar system to support life, current evidence suggests that in the distant past the planet Mars possessed bodies of liquid water on the surface.[76] For a brief period in Mars' history, it may have also been capable of forming life. At present though, most of the water remaining on Mars is frozen. If life exists at all on Mars, it is most likely to be located underground where liquid water can still exist.[77]

Conditions on the other terrestrial planets, Mercury and Venus, appear to be too harsh to support life as we know it. But it has been conjectured that Europa, the fourth-largest moon of Jupiter, may possess a sub-surface ocean of liquid water and could potentially host life.[78]

Recently, the team of Stéphane Udry have discovered a new planet named Gliese 581 d, which is an extrasolar planet orbiting the red dwarf star Gliese 581. Gliese 581 d appears to lie in the habitable zone of space surrounding the star, and therefore could possibly host life as we know it.
[edit]
See also Environment portal
Ecology portal
Earth sciences portal
Weather portal
Astronomy portal


Science:
Natural history
Natural science

Philosophy:
Mother Nature
Nature (philosophy)
Naturalism (philosophy): any of several philosophical stances, typically those descended from Materialism and Pragmatism that do not distinguish the supernatural from nature. This includes the methodological naturalism of natural science, which makes the methodological assumption that observable events in nature are explained only by natural causes, without assuming either the existence or non-existence of the supernatural.
Balance of nature (biological fallacy): A discredited concept of natural equilibrium in predator:prey dynamics.
Media:
Natural History, by Pliny the Elder
Nature, by Ralph Waldo Emerson
Nature, a prominent scientific journal
Nature (TV series)
Organizations:
The Nature Conservancy
Nature Detectives

[edit]
Notes and references

Landscape photograph of Tolima Colombia.

Coastal Douglas fir woodland in northwest Oregon.

Atmospheric gases scatter blue wavelengths of visible light more than other wavelengths, giving the Earth’s visible edge a blue halo. Credit: NASA's Earth Observatory.

A deserted island in Palau.

Two Giant Sequoias, Sequoia National Park. Note the large fire scar at the base of the right-hand tree; fires do not kill the trees but do remove competing thin-barked species, and aid Giant Sequoia regeneration.

Riparian zone along Trout Creek in the Trout Creek Mountains; part of the Burns Bureau of Land Management District in southeastern Oregon.
^ a b Harper, Douglas. "nature". Online Etymology Dictionary. Retrieved 2006-09-23.
^ A useful though somewhat erratically presented account of the pre-Socratic use of the concept of φύσις may be found in Naddaf, Gerard The Greek Concept of Nature, SUNY Press, 2006. The word φύσις, while first used in connection with a plant in Homer, occurs very early in Greek philosophy, and in several senses. Generally, these senses match rather well the current senses in which the English word nature is used, as confirmed by Guthrie, W.K.C. Presocratic Tradition from Parmenides to Democritus (volume 2 of his History of Greek Philosophy), Cambridge UP, 1965.
^ The first known use of physis was by Homer in reference to the intrinsic qualities of a plant: ὣς ἄρα φωνήσας πόρε φάρμακον ἀργεϊφόντης ἐκ γαίης ἐρύσας, καί μοι φύσιν αὐτοῦ ἔδειξε. (So saying, Argeiphontes [=Hermes] gave me the herb, drawing it from the ground, and showed me its nature.) Odyssey 10.302-3 (ed. A.T. Murray). (The word is dealt with thoroughly in Liddell and Scott's Greek Lexicon.) For later but still very early Greek uses of the term, see earlier note.
^ Isaac Newton's Philosophiae Naturalis Principia Mathematica (1687), for example, is translated "Mathematical Principles of Natural Philosophy", and reflects the then-current use of the words "natural philosophy", akin to "systematic study of nature"
^ The etymology of the word "physical" shows its use as a synonym for "natural" in about the mid-15th century: Harper, Douglas. "physical". Online Etymology Dictionary. Retrieved 2006-09-20.
^ "World Climates". Blue Planet Biomes. Retrieved 2006-09-21.
^ "Calculations favor reducing atmopshere for early Earth". Science Daily. 2005-09-11. Retrieved 2007-01-06.
^ "Past Climate Change". U.S. Environmental Protection Agency. Retrieved 2007-01-07.
^ Hugh Anderson, Bernard Walter (March 28, 1997). "History of Climate Change". NASA. Retrieved 2007-01-07.
^ Weart, Spencer (June 2006). "The Discovery of Global Warming". American Institute of Physics. Retrieved 2007-01-07.
^ Margulis, Lynn; Dorian Sagan (1995). What is Life?. New York: Simon & Schuster. ISBN 0684813262.
^ Dalrymple, G. Brent (1991). The Age of the Earth. Stanford: Stanford University Press. ISBN 0-8047-1569-6.
^ Morbidelli, A.; et al. (2000). "Source Regions and Time Scales for the Delivery of Water to Earth". Meteoritics & Planetary Science 35 (6): 1309–1320.
^ "Earth's Oldest Mineral Grains Suggest an Early Start for Life". NASA Astrobilogy Institute. 2001-12-24. Retrieved 2006-05-24.
^ Murphy, J.B.; R.D. Nance (2004). "How do supercontinents assemble?". American Scientist 92 (4): 324. doi:10.1511/2004.4.324.
^ Colebrook, Michael. "Chronology of Earth History". Cosmology and The Universe Story. Retrieved September 21 2006.
^ Stanley, Steven M. (1999). Earth System History. New York: W.H. Freeman. ISBN 0-7167-2882-6.
^ Kirschvink, J.L. (1992). "Late Proterozoic Low-Latitude Global Glaciation: The Snowball Earth". in J.W. Schopf, C. Klein eds.. The Proterozoic Biosphere. Cambridge: Cambridge University Press. pp. 51–52. ISBN 0-521-36615-1.
^ Raup, David M.; J. John Sepkoski Jr. (March 1982). "Mass extinctions in the marine fossil record". Science 215 (4539): 1501. doi:10.1126/science.215.4539.1501. PMID 17788674.
^ Margulis, Lynn; Dorian Sagan (1995). What is Life?. New York: Simon & Schuster. pp. 145. ISBN 0-684-81326-2.
^ Margulis, Lynn; Dorian Sagan (1995). What is Life?. New York: Simon & Schuster. ISBN 0-684-81326-2.
^ Diamond J (1989). "The present, past and future of human-caused extinctions". Philos Trans R Soc Lond B Biol Sci 325 (1228): 469–76; discussion 476–7. doi:10.1098/rstb.1989.0100. PMID 2574887.
^ Novacek M, Cleland E (2001). "The current biodiversity extinction event: scenarios for mitigation and recovery". Proc Natl Acad Sci USA 98 (10): 1029. doi:10.1073/pnas.091093698. PMID 11344295.
^ "The mid-Holocene extinction of silver fir (Abies alba) in the ..." pdf
^ See, e.g. [1], [2], [3]
^ "Ideal Gases under Constant Volume, Constant Pressure, Constant Temperature, & Adiabatic Conditions". NASA. Retrieved 2007-01-07.
^ Pelletier, Jon D. (2002). "Natural variability of atmospheric temperatures and geomagnetic intensity over a wide range of time scales". Proceedings of the National Academy of Sciences 99: 2546–2553. doi:10.1073/pnas.022582599. PMID 11875208.
^ "Tropical Ocean Warming Drives Recent Northern Hemisphere Climate Change". Science Daily. April 6, 2001. Retrieved 2006-05-24.
^ "Ocean". The Columbia Encyclopedia. 2002. New York: Columbia University Press
^ "Distribution of land and water on the planet". UN Atlas of the Oceans
^ Spilhaus, Athelstan F. 1942 (Jul.). "Maps of the whole world ocean." Geographical Review (American Geographical Society). Vol. 32 (3): pp. 431-5.
^ Brittanica online. "Lake (physical feature)". Retrieved 2008-06-25. "[a Lake is] any relatively large body of slowly moving or standing water that occupies an inland basin of appreciable size. Definitions that precisely distinguish lakes, ponds, swamps, and even rivers and other bodies of nonoceanic water are not well established. It may be said, however, that rivers and streams are relatively fast moving; marshes and swamps contain relatively large quantities of grasses, trees, or shrubs; and ponds are relatively small in comparison to lakes. Geologically defined, lakes are temporary bodies of water."
^ "[http://dictionary.reference.com/browse/lake a body of fresh or salt water of considerable size, surrounded by land. Dictionary.com definition]". Retrieved 2008-06-25.
^ River, Wordnet
^ USGS - U.S. Geological Survey - faqs, #17 What is the difference between mountain, hill, and peak; lake and pond; or river and creek?
^ Adams, C.E. (1994). "The fish community of Loch Lomond, Scotland : its history and rapidly changing status". Hydrobiologia 290 (1-3): 91–102. doi:10.1007/BF00008956.
^ Pidwirny, Michael (2006). "Introduction to the Biosphere: Introduction to the Ecosystem Concept". Fundamentals of Physical Geography (2nd Edition). Retrieved September 28 2006.
^ Pidwirny, Michael (2006). "Introduction to the Biosphere: Organization of Life". Fundamentals of Physical Geography (2nd Edition). Retrieved September 28 2006.
^ Pidwirny, Michael (2006). "Introduction to the Biosphere: Abiotic Factors and the Distribution of Species". Fundamentals of Physical Geography (2nd Edition). Retrieved September 28 2006. esp. section on "Abiotic Factors and Tolerance Limits."
^ Bailey, Robert G. (April 2004). "Identifying Ecoregion Boundaries" (PDF). Environmental Management 34 (Supplement 1): S14. doi:10.1007/s00267-003-0163-6.
^ Lawton, John (2001). "Earth System Science". Science 292 (5524): 1965. doi:10.1126/science.292.5524.1965. PMID 11408624.
^ Harding, Stephan (2006). "Earth System Science and Gaian Science". Schumacher College. Retrieved 2007-01-07.
^ a b No Man's Garden by Daniel B. Botkin p155-157
^ "Definition of Life". California Academy of Sciences. 2006. Retrieved 2007-01-07.
^ The figure "about one-half of one percent" takes into account the following (See, e.g., Leckie, Stephen (1999). "How Meat-centred Eating Patterns Affect Food Security and the Environment". For hunger-proof cities : sustainable urban food systems. Ottawa: International Development Research Centre. ISBN 0-88936-882-1., which takes global average weight as 60 kg.), the total human biomass is the average weight multiplied by the current human population of approximately 6.5 billion (see, e.g., "World Population Information". U.S. Census Bureau. Retrieved September 28 2006.): Assuming 60–70 kg to be the average human mass (approximately 130–150 lb on the average), an approximation of total global human mass of between 390 billion (390×109) and 455 billion kg (between 845 billion and 975 billion lb, or about 423 million–488 million short tons). The total biomass of all kinds on earth is estimated to be in excess of 6.8 x 1013 kg (75 billion short tons). By these calculations, the portion of total biomass accounted for by humans would be very roughly 0.6%.
^ Sengbusch, Peter V.. "The Flow of Energy in Ecosystems - Productivity, Food Chain, and Trophic Level". Botany online. University of Hamburg Department of Biology. Retrieved September 23 2006.
^ Pidwirny, Michael (2006). "Introduction to the Biosphere: Species Diversity and Biodiversity". Fundamentals of Physical Geography (2nd Edition). Retrieved September 23 2006.
^ "How Many Species are There?". Extinction Web Page Class Notes. Retrieved September 23 2006.
^ "Animal." World Book Encyclopedia. 16 vols. Chicago: World Book, 2003. This source gives an estimate of from 2–50 million.
^ "Just How Many Species Are There, Anyway?". Science Daily. May 2003. Retrieved September 26 2006.
^ Withers, Mark A.; et al. (1998). "Changing Patterns in the Number of Species in North American Floras". Land Use History of North America. Retrieved September 26 2006. Website based on the contents of the book: Sisk, T.D., ed., ed (1998). Perspectives on the land use history of North America: a context for understanding our changing environment (Revised September 1999 ed.). U.S. Geological Survey, Biological Resources Division. USGS/BRD/BSR-1998-0003.
^ "Tropical Scientists Find Fewer Species Than Expected". Science Daily. April 2002. Retrieved September 27 2006.
^ Bunker, Daniel E.; et al. (November 2005). "Species Loss and Aboveground Carbon Storage in a Tropical Forest". Science 310 (5750): 1029–31. doi:10.1126/science.1117682. PMID 16239439.
^ Wilcox, Bruce A. (March 2006). "Amphibian Decline: More Support for Biocomplexity as a Research Paradigm". EcoHealth 3 (1): 1. doi:10.1007/s10393-005-0013-5.
^ Clarke, Robin, Robert Lamb, Dilys Roe Ward eds., ed (2002). "Decline and loss of species". Global environment outlook 3 : past, present and future perspectives. London; Sterling, VA: Nairobi, Kenya : UNEP. ISBN 92-807-2087-2.
^ http://earthobservatory.nasa.gov/Newsroom/view.php?id=28907
^ http://www.sciencedaily.com/releases/2005/12/051205163236.htm
^ a b Line M (01 Jan 2002). "The enigma of the origin of life and its timing". Microbiology 148 (Pt 1): 21–7. PMID 11782495.
^ Berkner, L. V.; L. C. Marshall (May 1965). "On the Origin and Rise of Oxygen Concentration in the Earth's Atmosphere". Journal of the Atmospheric Sciences 22 (3): 225–261. doi:10.1175/1520-0469(1965)022<0225:otoaro>2.0.CO;2.
^ Schopf J (1994). "Disparate rates, differing fates: tempo and mode of evolution changed from the Precambrian to the Phanerozoic." (PDF). Proc Natl Acad Sci USA 91 (15): S14. doi:10.1073/pnas.91.15.6735. PMID 8041691.
^ Szewzyk U, Szewzyk R, Stenström T (1994). "Thermophilic, anaerobic bacteria isolated from a deep borehole in granite in Sweden.". Proc Natl Acad Sci USA 91 (5): 1810–3. doi:10.1073/pnas.91.5.1810. PMID 11607462.
^ Wolska K (2003). "Horizontal DNA transfer between bacteria in the environment.". Acta Microbiol Pol 52 (3): 233–43. PMID 14743976.
^ Horneck G (1981). "Survival of microorganisms in space: a review.". Adv Space Res 1 (14): 39–48. doi:10.1016/0273-1177(81)90241-6. PMID 11541716.
^ "flora". Merriam-Webster Online Dictionary. Merriam-Webster. Retrieved September 27 2006.
^ "Glossary". Status and Trends of the Nation's Biological Resources. Reston, VA: Department of the Interior, Geological Survey. 1998. SuDocs No. I 19.202:ST 1/V.1-2.
^ "Feedback Loops In Global Climate Change Point To A Very Hot 21st Century". Science Daily. May 22, 2006. Retrieved 2007-01-07.
^ "Plant Conservation Alliance - Medicinal Plant Working Groups Green Medicine". US National Park Services. Retrieved September 23 2006.
^ Oosthoek, Jan (1999). "Environmental History: Between Science & Philosophy". Environmental History Resources. Retrieved 2006-12-01.
^ For an example of a range of opinions, see: "On the Beauty of Nature". The Wilderness Society. Retrieved September 29 2006. and Ralph Waldo Emerson's analysis of the subject: Emerson, Ralph Waldo (1849). "Beauty". Nature; Addresses and Lectures.
^ Chinese brush painting Asia-art.net Accessed: May 20, 2006.
^ History of Conservation BC Spaces for Nature. Accessed: May 20, 2006.
^ Poincaré, Jules Henri (1913). The foundations of science; Science and hypothesis, The value of science, Science and method. New York: The Science Press. pp. 366–7. OCLC 2569829.
^ "Some Theories Win, Some Lose". WMAP Mission: First Year Results. NASA. Retrieved 29 2006.
^ Taylor, Barry N. (1971). "Introduction to the constants for nonexperts". National Institute of Standards and Technology. Retrieved 2007-01-07.
^ D. A. Varshalovich, A. Y. Potekhin, A. V. Ivanchik (2000). "Testing cosmological variability of fundamental constants". AIP Conference Proceedings 506: 503. doi:10.1063/1.1302777.
^ Bibring, J; Langevin Y, Mustard J, Poulet F, Arvidson R, Gendrin A, Gondet B, Mangold N, Pinet P, Forget F, Berthé M, Bibring J, Gendrin A, Gomez C, Gondet B, Jouglet D, Poulet F, Soufflot A, Vincendon M, Combes M, Drossart P, Encrenaz T, Fouchet T, Merchiorri R, Belluci G, Altieri F, Formisano V, Capaccioni F, Cerroni P, Coradini A, Fonti S, Korablev O, Kottsov V, Ignatiev N, Moroz V, Titov D, Zasova L, Loiseau D, Mangold N, Pinet P, Douté S, Schmitt B, Sotin C, Hauber E, Hoffmann H, Jaumann R, Keller U, Arvidson R, Mustard J, Duxbury T, Forget F, Neukum G (2006). "Global mineralogical and aqueous mars history derived from OMEGA/Mars Express data". Science 312 (5772): 400–4. doi:10.1126/science.1122659. PMID 16627738.
^ Malik, Tariq (2005-03-08). "Hunt for Mars life should go underground". The Brown University News Bureau. Retrieved September 4 2006.
^ Scott Turner (1998-03-02). "Detailed Images From Europa Point To Slush Below Surface". The Brown University News Bureau. Retrieved September 28 2006.

Cricket of Bangladesh

India, Bangladesh face off in 2011 World Cup opener

November 9, 2009

Mostafa Kamal, the BCB president,

unveils the opening fixture of the World Cup © AFP

 


India and Bangladesh, two of the co-hosts, will contest the opening game of the 2011 World Cup in Mirpur on February 19. The fixtures were announced at an ICC event in Mumbai on Monday.

The first game in Sri Lanka will feature the hosts taking on Canada in Hambantota, a new venue, on February 20. Pakistan, who lost their share of World Cup matches due to the security situation in the country, are playing all six of their group matches in Sri Lanka, which is hosting a total of 12 games.

The tournament in India, which is hosting 29 matches in all, will kick off with New Zealand playing Kenya in Chennai on February 20. India's first home game is against England in Kolkata on February 27 and they will also play their four remaining group games at home. Defending champions Australia begin their campaign against Zimbabwe in Ahmedabad on February 21.

The quarter-finals will be played in Dhaka on March 23 and 25, in Colombo on March 24 and in Ahmedabad on March 26 while the two semi-finals will be played in Colombo and Mohali on March 29 and 30. The renovated Wankhede Stadium in Mumbai will host the final on April 2.

"This announcement is an important indicator of the excellent progress we are making towards our flagship event which brings together teams from all our Members in nation-versus-nation action," ICC chief executive Haroon Lorgat said in Mumbai. "Preparation of venues and safety and security planning continues and I am confident that the host countries will showcase our great sport with its great spirit in the best possible light."

A total of 13 venues will be used over the 43-day tournament, which is a week shorter than the 2007 World Cup in the West Indies. The ten Full Member countries and four Associates have been divided into two groups of seven each, with the top four from each group qualifying for the quarter-finals. Group A includes Australia, Pakistan, New Zealand, Sri Lanka, Zimbabwe, Canada and Kenya. Group B comprises India, South Africa, England, West Indies, Bangladesh, Ireland and the Netherlands.

Date and Time 

Sat Feb 19 1st match - India v BangladeshShere Bangla National Stadium, Mirpur N/A Sun Feb 20 3rd match - Sri Lanka v CanadaHambantota International Cricket Stadium N/A Sun Feb 20 2nd match - Kenya v New ZealandMA Chidambaram Stadium, Chepauk, Chennai N/A Mon Feb 21 4th match - Australia v ZimbabweSardar Patel Stadium, Motera, Ahmedabad N/A Tue Feb 22 5th match - England v NetherlandsVidarbha Cricket Association Ground, Nagpur N/A Wed Feb 23 6th match - Kenya v PakistanHambantota International Cricket Stadium N/A Thu Feb 24 7th match - South Africa v West IndiesFeroz Shah Kotla, Delhi N/A Fri Feb 25 9th match - Bangladesh v IrelandShere Bangla National Stadium, Mirpur N/A Fri Feb 25 8th match - Australia v New ZealandVidarbha Cricket Association Ground, Nagpur N/A Sat Feb 26 10th match - Pakistan v Sri LankaR Premadasa Stadium, Colombo N/A Sun Feb 27 11th match - India v EnglandEden Gardens, Kolkata N/A Mon Feb 28 12th match - Netherlands v West IndiesFeroz Shah Kotla, Delhi N/A Mon Feb 28 13th match - Canada v ZimbabweVidarbha Cricket Association Ground, Nagpur N/A Tue Mar 1 14th match - Kenya v Sri LankaR Premadasa Stadium, Colombo N/A Wed Mar 2 15th match - England v IrelandM Chinnaswamy Stadium, Bangalore N/A Thu Mar 3 17th match - Canada v PakistanR Premadasa Stadium, Colombo N/A Thu Mar 3 16th match - Netherlands v South AfricaPunjab Cricket Association Stadium, Mohali, Chandigarh N/A Fri Mar 4 19th match - Bangladesh v West IndiesShere Bangla National Stadium, Mirpur N/A Fri Mar 4 18th match - New Zealand v ZimbabweSardar Patel Stadium, Motera, Ahmedabad N/A Sat Mar 5 20th match - Australia v Sri LankaR Premadasa Stadium, Colombo N/A Sun Mar 6 21st match - India v IrelandM Chinnaswamy Stadium, Bangalore N/A Sun Mar 6 22nd match - England v South AfricaMA Chidambaram Stadium, Chepauk, Chennai N/A Mon Mar 7 23rd match - Canada v KenyaFeroz Shah Kotla, Delhi N/A Tue Mar 8 24th match - New Zealand v PakistanPallekele International Cricket Stadium N/A Wed Mar 9 25th match - India v NetherlandsFeroz Shah Kotla, Delhi N/A Thu Mar 10 26th match - Sri Lanka v ZimbabwePallekele International Cricket Stadium N/A Fri Mar 11 28th match - Bangladesh v EnglandZohur Ahmed Chowdhury Stadium, Chittagong N/A Fri Mar 11 27th match - Ireland v West IndiesPunjab Cricket Association Stadium, Mohali, Chandigarh N/A Sat Mar 12 29th match - India v South AfricaVidarbha Cricket Association Ground, Nagpur N/A Sun Mar 13 30th match - Canada v New ZealandWankhede Stadium, Mumbai N/A Sun Mar 13 31st match - Australia v KenyaM Chinnaswamy Stadium, Bangalore N/A Mon Mar 14 33rd match - Bangladesh v NetherlandsZohur Ahmed Chowdhury Stadium, Chittagong N/A Mon Mar 14 32nd match - Pakistan v ZimbabwePallekele International Cricket Stadium N/A Tue Mar 15 34th match - Ireland v South AfricaEden Gardens, Kolkata N/A Wed Mar 16 35th match - Australia v CanadaM Chinnaswamy Stadium, Bangalore N/A Thu Mar 17 36th match - England v West IndiesMA Chidambaram Stadium, Chepauk, Chennai N/A Fri Mar 18 37th match - New Zealand v Sri LankaWankhede Stadium, Mumbai N/A Fri Mar 18 38th match - Ireland v NetherlandsEden Gardens, Kolkata N/A Sat Mar 19 40th match - Bangladesh v South AfricaShere Bangla National Stadium, Mirpur N/A Sat Mar 19 39th match - Australia v PakistanR Premadasa Stadium, Colombo N/A Sun Mar 20 41st match - Kenya v ZimbabweEden Gardens, Kolkata N/A Sun Mar 20 42nd match - India v West IndiesMA Chidambaram Stadium, Chepauk, Chennai N/A Wed Mar 23 Quarter Final - TBC v TBCShere Bangla National Stadium, Mirpur N/A Thu Mar 24 Quarter Final - TBC v TBCR Premadasa Stadium, Colombo N/A Fri Mar 25 Quarter Final - TBC v TBCShere Bangla National Stadium, Mirpur N/A Sat Mar 26 Quarter Final - TBC v TBCSardar Patel Stadium, Motera, Ahmedabad N/A Tue Mar 29 Semi Final - TBC v TBCR Premadasa Stadium, Colombo N/A Wed Mar 30 Semi Final - TBC v TBCPunjab Cricket Association Stadium, Mohali, Chandigarh N/A Sat Apr 2 Final - TBC v TBCWankhede Stadium, Mumbai N/A

Dhaka Information and History

DELTA CAPITAL

Located on the flood-prone delta of one of the world's great river systems, the Ganges-Brahmaputra, the city of Dhaka was badly damaged in the war that Bangladesh fought for independence from Pakistan. Dhaka was inaugurated as the capital of the new nation in 1971, but it had already long served as the Mogul capital of the province of Bengal. The city is made up of two sections: an older area, which is a maze of narrow lanes and crowded bazaars, and an orderly and well planned government center.

ECONOMY
Garments and knitwear, frozen seafood, jute goods, leather products, tea, fertilizer, ceramic tableware, newsprint, pharmaceuticals, ship disassembly (for parts).
Text source: National Geographic Atlas of the World, Eighth Edition, 2004

Dhaka, Bangladesh Fast Facts
Population
City proper 5,378,023
Metro area 12,560,000
Elevation
4 meters (13 feet)
Temperature
January 26°/13°C (79°/55°F);
July 31°/26°C (88°/79°F)
Average daily High/Low °C (°F) Rainfall
January 8 (0.3);
July 399 (16)
Average monthly mm (inches)
Time Zone
+6 hours UTC (Coordinated Universal Time)

Geography

Bangladesh, on the northern coast of the Bay of Bengal, is surrounded by India, with a small common border with Myanmar in the southeast. The country is low-lying riverine land traversed by the many branches and tributaries of the Ganges and Brahmaputra rivers. Tropical monsoons and frequent floods and cyclones inflict heavy damage in the delta region.
Government
Parliamentary democracy. 

History

What is now called Bangladesh is part of the historic region of Bengal, the northeast portion of the Indian subcontinent. Bangladesh consists primarily of East Bengal (West Bengal is part of India and its people are primarily Hindu) plus the Sylhet district of the Indian state of Assam.

The earliest reference to the region was to a kingdom called Vanga, or Banga (c. 1000 B.C. ). Buddhists ruled for centuries, but by the 10th century Bengal was primarily Hindu. In 1576, Bengal became part of the Mogul Empire, and the majority of East Bengalis converted to Islam. Bengal was ruled by British India from 1757 until Britain withdrew in 1947, and Pakistan was founded out of the two predominantly Muslim regions of the Indian subcontinent. For almost 25 years after independence from Britain, its history was part of Pakistan's ( see Pakistan ).

West Pakistan and East Pakistan were united by religion (Islam), but their peoples were separated by culture, physical features, and 1,000 miles of Indian territory.