Expert-reviewed information about the Earth. For everyone.
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Featured Article
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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Featured Article
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 »
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Featured Article
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 »
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Featured Gallery
Cabo de Gata-Nijar Natural Park, Andalucia,...
Cabo de Gata-Nijar Natural Park lies along the Alboran Sea of the Mediterranean coast of Andalucia, Spain. The most arid area in the entirety of Europe, it boasts varied... More »
New Caledonia rainforests
Last Updated on 2013-05-21 at 18:04
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 to much of the... More »
Balsam fir
Last Updated on 2013-05-21 at 17:28
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 »
Hawaii tropical dry forests
Last Updated on 2013-05-21 at 16:59
Hawaii tropical dry forests typically occur on the leeward side of the principal Hawaiian Islands (that is the side not exposed to the prevailing winds as they come ashore),... More »
Mesoamerican Gulf-Caribbean mangroves
Last Updated on 2013-05-21 at 15:19
The Mesoamerican Gulf-Caribbean mangroves occupy a long expanse of disjunctive coastal zone along the Caribbean Sea and Gulf of Mexico for portions of Central America and... More »
Bosporus Straits, Turkey
Last Updated on 2013-05-21 at 12:23
The Bosporus or Bosphorus (also known as the Istanbul Strait) is a strait connecting the Black Sea with the Sea of Marmara (and beyond it, through the Dardenelles to the... More »
Redwood Sorrel
Last Updated on 2013-05-20 at 18:13
Redwood Sorrel (Oxalis oregana)
Redwood Sorrel is in the Oxalidaceae, the wood sorrel family, a relatively small family with three genera and 875 species of mostly tropical... More »
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