An artist's illustration of events on the sun changing the conditions in near-Earth space. NASA hide caption

itoggle caption NASA

Jeff Hudale, who is autistic, demonstrates a face recognition test at the University of Pittsburgh in 2010. Researchers use eye tracking devices to monitor and record what he is looking at. Rebecca Droke/Pittsburgh Post-Gazette hide caption

itoggle caption Rebecca Droke/Pittsburgh Post-Gazette

A working gas well head is fenced in just opposite of a home in Dish, Texas. Dish is about 30 miles north of Fort Worth. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR

William Reigle has fibrosis, a disease that may be aggravated by nearby fracking. He's one of more than 2 million Pennsylvanians who get their health care from Geisinger Health System. The system wants to use its extensive database of patient records to study the health impact of natural gas production. Maggie Starbard/NPR hide caption

itoggle caption Maggie Starbard/NPR

Abby Mahoney, 13, has Asperger's syndrome. She says she has memorized nearly everything there is to know about Star Wars. Her enthusiasm for the subject helped make her the target of a bullying boy. Courtesy of the Mahoney family hide caption

itoggle caption Courtesy of the Mahoney family

Researchers studied baboons, including this one, and found that with training, they could distinguish real four-letter English words from four letters that weren't a word. Joel Fagot/Science/AAAS hide caption

itoggle caption Joel Fagot/Science/AAAS

Environmental groups say a ban would protect consumers from the health effects of BPA that leaches from products including some soup cans. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images

This image shows the grid structure of the major pathways of the brain. It was created using a scanner that's part of the Human Connectome Project, a five-year effort which is studying and mapping the human brain. MGH-UCLA Human Connectome Project hide caption

itoggle caption MGH-UCLA Human Connectome Project

Pinwheels like these are often used to test nerve responses. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Chris Stephens, 28, who has been battling depression all of his life, plays with his dogs at home in Concord, Calif., on Friday. After a dose of ketamine, Stephens says, "I actually wanted to do things. I wanted to live life." Lianne Milton for NPR hide caption

itoggle caption Lianne Milton for NPR