Researchers studying the effects of the BP oil spill are journeying to the seafloor aboard a small submarine named Alvin. They're finding a layer of oily sediment atop the normal gray mud. Though oil does naturally seep from the floor in some parts of the gulf, the effects of the massive deluge of oil are still unknown.
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The research submarine Alvin is launched from Atlantis in the Gulf of Mexico.
Traditional herders worry that mines will siphon off already dwindling water supplies in the Gobi.
Ira Flatow and guests discuss the future of food in the city, and the joys of eating garden weeds.
A study of drug disposal methods finds that trashing them may be the most Earth-friendly option.
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The basic idea: Let rich countries pay poor ones to save and even expand carbon-absorbing forests.
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