Scenes like this, from Kolkata, are typical across some of India's biggest cities. Dibyangshu Sarkar /AFP/Getty Images hide caption

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Goats and Soda

A Bad Night's Sleep Might Do More Harm Than You Think

What if you could never get a good night's rest? Researchers are investigating whether sleep deprivation can keep people trapped in poverty.

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Researchers say poor sleep quality, too much sleep and too little sleep all play a role in heart health. iStockphoto hide caption

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Workers try to remove some of the 11 million gallons of oil spilled by the Exxon Valdez off Alaska in 1989. The ship's third mate may have been up for 18 hours before the accident. Rob Stapleton/AP hide caption

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To sleep, perchance to consolidate important connections in far-flung parts of the brain. Alberto Ruggieri/Illustration Works/Getty Images hide caption

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