Earth

It is not rare to find in the fossil record of vertebrates cases in which fossils from one or few extinct species predominate over others…
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THE QUESTION When we think about a tropical site, what commonly comes in mind is heat, rainforests, beaches, and colorful reefs. The tropics are the…
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Ice streams and outlet glaciers are relatively fast-flowing regions of ice that are adjacent to nearly stagnant ice or mountains. These ice streams are visible…
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THE QUESTION Biodiversity  – the richness of species found at a given location – is critical to maintaining ecological processes and the benefits provided to…
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The presence of soluble salts, such as sodium chloride, in agricultural soils can dramatically reduce crop yield. In irrigated agriculture, especially in arid and semi-arid…
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Hurricane effects are increasing in recent times; every day we hear in the news reports of a new high-impact meteorological phenomenon in different parts of…
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Dams have expanded rapidly in the world. People focus on issues ranging from irrigation, hydroelectric power, water resource allocation, and ecological restoration and believe it…
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Horseshoe crabs, or limulids, are some of the strangest of shoreline creatures. There are only four species today, three of them living in shallow waters…
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Forests have a complicated relationship with carbon and climate. They sequester huge quantities of carbon dioxide from the atmosphere, estimated at 10-20 percent of U.S. emissions,…
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Billions of larval blue crabs, or zoeae, are spawned each year into the many estuaries and bays of the Atlantic and Gulf coasts of the…
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Nutrient export from the Corn Belt of the United States is impacting rivers at local and regional scales and is contributing to the development of…
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