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Expert-reviewed information about the Earth. For everyone.
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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 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 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 »
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Featured Video
Jean-Michel Cousteau: use of oil dispersants...
The Rundown caught up with ocean explorer and occasional PBS host Jean-Michel Cousteau to chat about what his team discovered on dives in the aftermath of the Deepwater Horizon... More »
Switzerland
Last Updated on 2013-06-18 at 20:12
Switzerland is a landlocked nation of over seven-and-a-half million people in central Europe, east of France, north of Italy. It is at the crossroads of northern and... More »
Pollution: agricultural operations
Last Updated on 2013-06-18 at 14:39
Nonpoint Source Pollution
Pollution: Agricultural Operations
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Pliocene
Last Updated on 2013-06-18 at 14:31
Editor's note: The Pliocene is the period of the geologic timescale that spans the era from approximately 5.331 to 2.588 million years ago. It preceeds the Pleistocene... More »
Great Basin shrub steppe
Last Updated on 2013-06-18 at 04:23
The Great Basin shrub steppe ecoregion is situated in the most northerly of the four American deserts. Unlike the other three, which have almost exclusive ties to... More »
Nonpoint source
Last Updated on 2013-06-18 at 02:18
A nonpoint source refers to a source of pollution from an origin other than a well defined point. The term is most often applied to air pollution, water pollution and noise... More »
Tamarix control
Last Updated on 2013-06-17 at 17:10
Tamarix control is a significant invasive species issue in the western USA, especially in the American southwest. The woody plant genus Tamarix, also , also known by the... More »
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