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The Homeland Security website Ready.gov warns that following a nuclear blast, you should wash your hair with shampoo but not use conditioner, because conditioner can bind radioactive material to your hair. Smith Collection/Getty Images hide caption

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Smith Collection/Getty Images

Milagros "Mili" Hernandez, 8, plays soccer in Ohama, Neb. Her team was disqualified from the final round of a tournament because somebody had complained to organizers that there was a boy on the team. WOWT/Screenshot by NPR hide caption

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WOWT/Screenshot by NPR

Wes Moore speaks at the Robin Hood Veterans Summit at Intrepid Sea-Air-Space Museum on May 7, 2012 in New York City. Craig Barritt/Getty Images hide caption

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Craig Barritt/Getty Images

Zia Simpson, a student and sales assistant in Cape Town, says even her father tells her to tame her Afro. "That generation fought against apartheid, but they still carry around the mentality that green eyes look better on a person, that straight hair looks better on a person." Alan Greenblatt for NPR hide caption

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Alan Greenblatt for NPR

Maybe someday Jerry won't be laughing at George's follicularly challenged scalp. But despite scientific advances there's still no cure for baldness. NBC/NBC via Getty Images hide caption

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NBC/NBC via Getty Images

Some treatments to straighten hair rely on formaldehyde, which can irritate the skin and lungs. It's also carcinogenic. Felipe Dana/AP hide caption

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Felipe Dana/AP