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The Science Of Sinkholes

A man in Florida died after a sinkhole opened beneath his bedroom, swallowing him as he slept. A golfer broke his shoulder when a sinkhole opened on a golf course in Illinois. Suddenly it seems sinkholes are making news everywhere. But scientists insist they're a common and naturally occurring geologic phenomenon. Sinkholes usually occur on the fragile terrain called “karst," which underlies about 20 percent of the United States. Sinkholes also can be triggered by human activity. We learn what sinkholes reveal about the interconnectedness of life above and below ground, our freshwater supplies and climate change.

Sinkhole Map

This simplified map shows the areas with potential for sinkholes and karst in the conterminous United States (Source: U.S. Geological Survey)

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It seems like a simple question: How many parts can you divide a line into? The troublesome answer was square at the root of two of Europe's greatest social crises.
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While you won't find cigarettes in restaurants anymore, some smoking isn't banned. It's not just meat, either; it's hot to smoke just about anything edible.
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Virginia Remains At Odds With Feds On Medicaid Expansion

Lawmakers in Virginia continue to resist the $9.6 billion Medicaid expansion on offer from the federal government as part of the Affordable Care Act.

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Watch For The Blind Lets You Feel Time Passing

A new watch allows the blind to feel time on their wrists. Designer Hyungsoo Kim tells NPR's Wade Goodwyn his watch allows users to tell time accurately without revealing their disabilities.

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