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Expert-reviewed information about the Earth.  For everyone.

    • Sulfur Featured Article Sulfur Sulfur

      Sulfur (alternatively spelled sulphur) is the chemical element with  atomic number 16. The chemical symbol S is used in formulae and abbreviations. Sulfur has high abundance... More »

    • DNA Featured Article DNA DNA

      Deoxyribonucleic acid (DNA) is a long chain organic molecule that contains the coding for all metabolic and reproductive processes of all living organisms, save for certain... More »

    • Petrochemicals Featured Article Petrochemicals Petrochemicals

      Petrochemicals are chemical products made from the hydrocarbons present in raw natural gas and petroleum crude oil. The largest petrochemical manufacturing industries are to... More »

    • Argon Featured Article Argon Argon

      Argon is a chemical element designated by the symbol Ar. Argon has atomic number 18 and is the third element in group 18 of the periodic table (noble gases). Argon is present... More »

    • Virus Featured Article Virus Virus

      A virus is a microscopic organism that can replicate only inside the cells of a host organism. Most viruses are so tiny they are only observable with at least a conventional... More »

    • Algae Featured Article Algae Algae

      Introduction Algae comprise a diverse group of typically autotrophic organisms, ranging from unicellular to multicellular forms. The largest and most complex marine forms... More »

    • Panamá Featured Article Panamá Panamá

        Panama is a nation of three-and-a-half million people, located between Costa Rica to the north and Columbia to the south. Panama connects the continental land... More »

    • Nuclear power Featured Article Nuclear power Nuclear power

      Nuclear power is the generation of electricity from controlled reactions within the nucleii of atoms that release energy used to boil water, the steam from which drives a... More »

Recently Updated
Hainan Island monsoon rainforests Last Updated on 2013-05-21 at 20:13 Hainan Island, located in the South China Sea, supports extensive monsoon forest in its seasonally dry interior. Many endemic taxa have evolved here, and forest types resemble... More »
Myanmar coastal rainforests Last Updated on 2013-05-21 at 19:55 The Myanmar coastal rainforests are a diverse set of climatic niches and habitats that include flora and fauna from the Indian, Indochina, and Sundaic regions. Though low in... More »
Vanuatu rainforests Last Updated on 2013-05-21 at 19:51 The Vanuatu rainforests consist of more than eighty true oceanic islands, in two groups, at the edge of both the Australasian realm and the Pacific Basin. They contain fifteen... More »
Mindanao-Eastern Visayas rainforests Last Updated on 2013-05-21 at 18:52 This ecoregion features lowland and hill forests on a number of large Philippine islands that, though currently disconnected, were part of one island during the... More »
Temperate rainforests Last Updated on 2013-05-21 at 18:46 This article draws upon the work of numerous writers, published by Ecotrust in the cited works below, and was also contributed to by Malka Geffen of Ecotrust.... More »
Tasmanian temperate rainforests Last Updated on 2013-05-21 at 18:41 The cool, moist climate of rugged western Tasmania harbors a rich, Gondwanan flora. Rainforest vegetation mixes with a variety of habitats in this ecoregion, supporting endemic... More »
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