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Songbirds, like this male tricolored blackbird, develop regional accents in the same way humans do, researchers found. And, like humans, songbirds seem to respond better to accents they already know. Dave Menke/Courtesy of the U.S. Fish and Wildlife Service hide caption

itoggle caption Dave Menke/Courtesy of the U.S. Fish and Wildlife Service

The locals of Beatty, Nev., brought back the Amargosa toad from near extinction and kept the species off the endangered species list. U.S. Fish and Wildlife Service hide caption

itoggle caption U.S. Fish and Wildlife Service

The Food and Drug Administration has approved Nuedexta to treat a condition known as emotional incontinence. Courtesy of Avanir hide caption

itoggle caption Courtesy of Avanir

A clinical psychologist in Connecticut monitors the electrode impulses of a patient with ADHD. Some parents are turning to neurofeedback to treat the disorder. Catherine Avalone/The Middletown Press hide caption

itoggle caption Catherine Avalone/The Middletown Press

Children await treatment at a medical facility in St. Marc, northern Haiti, amid a cholera epidemic that has claimed more than 100 lives and infected more than 1,000 people over the past few days. Thony Belizaire/AFP/Getty Images hide caption

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Scientists exposed the brains of specially engineered lab mice to pulses of light and saw brain cells responding as if they were triggered by an odor. The research could be applied to diseases including Alzheimer's and Parkinson's. Eric Isselee/iStockphoto.com hide caption

itoggle caption Eric Isselee/iStockphoto.com
Defense and Veterans Brain Injury Center via Technology Review

Scientists found that neurons (red) are able to leak signaling chemicals to nearby cells. The finding may help explain the cause of some nervous system conditions, including epilepsy and chronic pain. Institute for Stem Cell Research/Getty Images hide caption

itoggle caption Institute for Stem Cell Research/Getty Images