Expert-reviewed information about the Earth. For everyone.
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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 »
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Featured Article
Flora of Napa County, California
Napa County is a rural county in northern California encompassing nearly 500,000 acres (200,000 hectares), about 0.5 % of the landmass of the state. It is located 25 miles (40... 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 »
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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 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
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 »
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 »
Hawaii tropical dry forests
Last Updated on 2013-05-21 at 06:07
Hawaii tropical dry forests typically occurred on the leeward side of the main islands and once covered the summit regions of the smaller islands. Most native lowland forests... 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 »
Strait of Hormuz
Last Updated on 2013-05-20 at 13:48
Located between Oman and Iran, the Strait of Hormuz (26°34'0.00"N, 56°15'0.00"E) connects the Persian Gulf with the Gulf of Oman and the Arabian... More »
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