Expert-reviewed information about the Earth. For everyone.
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European otter
The European otter (Lutra lutra) is a broadly distributed marine mammal found in both marine and freshwater systems over considerable portions of Europe, Asia and North Africa;... More »
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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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Douglas-fir
The Douglas-fir (scientific name: Pseudotsuga) is a genus of tree that includes ar least five species found in North America and... More »
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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 »
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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 »
Sumatran lowland rainforests
Last Updated on 2013-05-24 at 00:32
The Sumatran lowland rainforests are one of the most diverse forests on Earth and also among the most threatened.
These forests contain comparable levels of More »
Extraterrestrial soils
Last Updated on 2013-05-23 at 18:48
Extraterrestrial soils may be defined as any of the solid granular crustal features of planets and moon other than those soils on planet Earth. Despite four decades of space... More »
New Caledonia rainforests
Last Updated on 2013-05-23 at 18:36
Introduction
The islands of New Caledonia contain some of the most distinctive plants in the world, with a large number of species, endemics, and an ancient character... More »
Eastern Miombo woodlands
Last Updated on 2013-05-22 at 21:56
Confined to the lower elevations of the Central African Plateau, the Eastern Miombo woodland ecoregion ranges from southern Tanzania to northern Mozambique and... More »
Balsam fir
Last Updated on 2013-05-22 at 21:48
This plant guide on the Balsam fir, Pinus balsamea L., was chiefly prepared and contributed by the U.S. Department of Agriculture's Natural Resources Conservation... More »
Andaman Islands rainforests
Last Updated on 2013-05-22 at 21:38
Located between the Bay of Bengal and the Andaman Sea, between India to the west and Myanmar to the east, the Andaman Islands are affiliated with both countries in... More »
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