Expert-reviewed information about the Earth. For everyone.
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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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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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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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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 »
Northwestern thorn scrub forests
Last Updated on 2013-05-25 at 15:23
The Northwestern thorn scrub forests ecoregion represents a large expanse of degraded dry forest surrounding the Thar Desert. Neither exceptionally species-rich nor high in... More »
Pakistan
Last Updated on 2013-05-25 at 15:06
Pakistan is a nation of one hundred and ninety million people (mid-2013 est.) in southern Asia, bordering the Arabian Sea, between India on the east and Iran and Afghanistan on... More »
Sulu Archipelago rainforests
Last Updated on 2013-05-25 at 14:29
Although these islands represent transitional stepping stones from the island of Borneo to Mindanao in the Philippines, they have evolved their own distinctive faunas. The Sulu... More »
Turkish Straits
Last Updated on 2013-05-24 at 13:41
The Bosporus and Dardanelles are the Turkish Straits and divide Asia from Europe.
The Bosporus is a 17-mile long waterway that connects the Black Sea with the... More »
Dardanelles
Last Updated on 2013-05-24 at 13:41
The Dardanelles (formerly known as the Hellespont) is a 38 mile (61 km) long waterway that links the Sea of Marmara (and through the Bosporus Strait, the Black Sea) with the... More »
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