Expert-reviewed information about the Earth. For everyone.
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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 »
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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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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 »
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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