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
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 »
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Featured Article
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 »
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 »
Panamá
Last Updated on 2013-05-24 at 13:23
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 masses of... More »
Isthmus of Panama
Last Updated on 2013-05-24 at 13:10
The Isthmus of Panama (sometimes known as the Isthmus of Darien), a narrow strip of land connecting the continents of North and South America. The Isthmas in crossed by the... 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 »
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