Stefano Amabili walks under the sun in Miami Beach, Florida, in May. The Center for Disease Control and Prevention has found that more people are using sunscreen and protecting themselves from the sun's rays. Joe Raedle/Getty Images hide caption

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Pathological nail biting may be a form of grooming on steroids, but it also makes the biter feel good, unlike fear-driven OCD. Andrea Kissack for KQED hide caption

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A contractor designed the Squatty Potty to help his mother get closer to the squatting position on the john. Courtesy of Squatty Potty hide caption

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From left: Frank Wild, Ernest Shackleton, Dr. Eric Marshall and Jameson Adams head back to base camp after getting within 97 miles of the South Pole — closer than anyone had gotten before them — in January 1909. /Getty Images hide caption

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Fire department personnel, police officers and paramedics at the scene of a fatal collision on Highway 401 in Mississauga, Ontario, in July 2011. Stacey Newman/iStockphoto.com hide caption

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A man stands in a fountain in Washington Square Park on July 18, in New York City. Temperatures were expected in the upper 90's during another heat wave in the city. Mario Tama/Getty Images hide caption

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Two men from northwestern Missouri became ill after tick bites infected them with a previously unknown virus. iStockphoto.com hide caption

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A Beechcraft airplane sprays insecticide over Dallas early Monday morning to curb the spread of West Nile virus. LM Otero/AP hide caption

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