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Football rules, uniforms, helmets and protective gear have changed a lot over the years. Keystone-France/Gamma-Keystone via Getty Images hide caption

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Keystone-France/Gamma-Keystone via Getty Images

Why Do We Love Football So Much? Theater Tackles Tough Questions

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A couple of male, genetically modified Aedes aegypti mosquitoes take flight. Dr Derric Nimmo/Oxitec hide caption

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Dr Derric Nimmo/Oxitec

Florida Health Officials Hope To Test GMO Mosquitoes This Spring

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Research into how the human brain develops helps explain why teens have trouble controlling impulses. Leigh Wells/Ikon Images/Corbis hide caption

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Leigh Wells/Ikon Images/Corbis

Why Teens Are Impulsive, Addiction-Prone And Should Protect Their Brains

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A marijuana bud displayed in Denver. Don't legalize pot, the pediatricians say, but don't lock teenagers up for using it, either. Seth McConnell/The Denver Post/Getty Images hide caption

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Seth McConnell/The Denver Post/Getty Images

Ultrasound is often used for prenatal screening. It's just one of several prenatal screenings available to pregnant women. iStockphoto hide caption

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iStockphoto

DNA Blood Test Gives Women A New Option For Prenatal Screening

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The UASK app helps sexually assaulted college students in D.C. access a range of services, from rides to the hospital to phone numbers for counselors. The information is personalized to their school. Another version of the app, ASK, provides the same resources to non-students. Emily Jan/NPR hide caption

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Emily Jan/NPR

App Links Sex Assault Survivors To Help, But Who Downloads It?

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Leaks in a barrier between blood vessels and brain cells could contribute to the development of Alzheimer's. VEM/Science Source hide caption

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VEM/Science Source

Leaky Blood Vessels In The Brain May Lead To Alzheimer's

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Daniel Horowitz for NPR

A Blind Woman Gains New Freedom, Click By Click By Click

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A scorpion fly perches on a leaf at the research farm where Lindgren studied the decomposition of human remains. Scorpion flies are among the first insects to visit a corpse. Courtesy of Natalie Lindgren hide caption

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Courtesy of Natalie Lindgren

Vapor from an e-cigarette obscures the user's face in a London coffee bar. Dan Kitwood/Getty Images hide caption

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Dan Kitwood/Getty Images

E-Cigarettes Can Churn Out High Levels Of Formaldehyde

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