Goddard Space Flight Center Scientific Visualization Studio/NASA

Does a glass or two of wine during pregnancy really increase the child's health risks? Epigenetics may help scientists figure that out. Katherine Streeter for NPR hide caption

itoggle caption Katherine Streeter for NPR

A Global Hawk unmanned aircraft comes in for a landing at the Wallops Flight Facility in Wallops Island, Va., on Sept. 7, 2012, after studying Hurricane Leslie. The remotely controlled planes can stay in the air for as long as 28 hours and fly over hurricanes at altitudes of more than 60,000 feet. NASA hide caption

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Strenuous mental exercise like reading difficult books, solving tricky math problems — or, maybe, playing the right video game — can help keep a healthy brain sharp, research suggests. Images.com/Corbis hide caption

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The underlying biology of age-related memory glitches — in old mice and old people — is different from what happens with Alzheimer's, recent research suggests. Anthony Bradshaw/iStockphoto.com hide caption

itoggle caption Anthony Bradshaw/iStockphoto.com

Belgian Blue bulls look like they are made of muscle because they have a mutation in the gene that codes for the protein myostatin. In humans, as in other types of cattle, myostatin normally limits the number of muscle fibers that form before birth and then limits the growth of those fibers later on. Courtesy of Se-Jin Lee and Alexandra McPherron/PNAS hide caption

itoggle caption Courtesy of Se-Jin Lee and Alexandra McPherron/PNAS

A gene known as DRD2 affects the brain's dopamine system and is known to be associated with aggressive behavior. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Patong beach in Phuket, Thailand, was destroyed by the tsunami on Dec. 25, 2004. More than 230,000 people died. Gamma-Rapho via Getty Images hide caption

itoggle caption Gamma-Rapho via Getty Images

Instructional assistant Jessica Reeder touches her nose to get Jacob Day, 3, who has autism, to focus his attention on her during a therapy session in April 2007. Rich Pedroncelli/AP hide caption

itoggle caption Rich Pedroncelli/AP

Barton Holmes, 2, sits with his father, Kevin Holmes, and his mother, Catherine McEaddy Holmes, during an appointment at Children's National Medical Center in Washington, D.C. Maggie Starbard/NPR hide caption

itoggle caption Maggie Starbard/NPR

Hurricane Sandy churns off the Atlantic coast on Oct. 29. NOAA officials are forecasting seven to 11 hurricanes, compared with about six in a typical season. NASA/Getty Images hide caption

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Despite significant advances in neurology and imaging, researchers still don't have simple lab tests for diagnosing patients with mental disorders. Diagnoses are still mostly based on a patient's signs and symptoms. BSIP/UIG via Getty Images hide caption

itoggle caption BSIP/UIG via Getty Images