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Expert-reviewed information about the Earth.  For everyone.

    • Flora of Napa County, California Featured Article Flora of Napa County, California Flora of Napa County, California

      Napa County is a rural county in northern California encompassing nearly 500,000 acres (200,000 hectares), about 0.5 % of the landmass of the state. It is located 25 miles (40... 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 »

    • Earth's atmosphere Featured Article Earth's atmosphere Earth's atmosphere

      The Earth's atmosphere is an envelope of gas that surrounds the Earth and extends from the Earth's surface out thousands of kilometres, becoming increasingly thinner (less dense)... 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 »

    • Herbivore Featured Article Herbivore Herbivore

      Introduction A herbivore is an animal that obtains its energy and nutrients by feeding on plants.  Different types of herbivores eat different plant parts.  For... More »

    • Jamaican dry forests Featured Article Jamaican dry forests Jamaican dry forests

      Jamaican dry forests is an ecoregion that covers a minority of the land area of the nation island of Jamaica, which ranks fifth among the Earth's islands in terms of endemic plant... More »

    • 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 »

    • 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 »

    • Biomass Featured Article Biomass Biomass

      Biomass is a term in ecology for the  mass of living organisms in a given ecosystem.  Biomass can refer to the living stock of species in a given habitat, but can... 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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