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Expert-reviewed information about the Earth.  For everyone.

    • Sulfur Featured Article Sulfur Sulfur

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        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 »

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      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 »

    • Dudleya cymosa (Lem.) Britt. & Rose Featured Article Dudleya cymosa (Lem.) Britt. & Rose Dudleya cymosa (Lem.) Britt. & Rose

      Dudleya cymosa (Lem.) Britt. & Rose is a perennial low-growing succulent plant species that is endemic to California. Having a number of subspecies, this fleshy plant is... 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 »

    • Ecological pyramids Featured Article Ecological pyramids Ecological pyramids

      Ecological pyramids are diagrams that illustrate how ecologically important factors, such as energy, biomass, and population size, vary between trophic levels in an ecosystem.... More »

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      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 »

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Cuban moist forests Last Updated on 2013-05-22 at 13:51 The Cuban moist forests originally held exceptionally distinctive insular flora and fauna, with many species, genera and families unique to its forests in the form of relict... More »
Valdivian temperate forests Last Updated on 2013-05-22 at 01:13 The Valdivian temperate forests and the more hygrophilous vegetation of the Mediterranean area of central Chile, represent a true biogeographic island separated from... More »
Northeastern Congolian lowland forests Last Updated on 2013-05-22 at 01:09 The Northeastern Congolian lowland forests contains endemic species and large areas of forest wilderness with intact animal and plant assemblages. Endemic species include the... More »
Central Pacific coastal forests Last Updated on 2013-05-22 at 00:59 The Central Pacific Coastal Forests stretch from southern Oregon to the northern tip of Vancouver Island. Major habitats of this diverse region include sea stacks, sandy... More »
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 »
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