Unrefrigerated brains in preserving solution are stacked high on shelves at the Harvard Brain Tissue Resource Center at McLean Hospital. Olin College of Engineering/Flickr hide caption

itoggle caption Olin College of Engineering/Flickr

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

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

Novak Djokovic of Serbia serves during the men's singles match against Janko Tipsarevic of Serbia during the Barclays ATP World Tour Finals at the O2 Arena on November 25, 2011 in London, England. In today's first hour, we'll talk about the ideas, people and products that have a good year. Clive Brunskill/Getty Images hide caption

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Judith Ursitti is a Massachusetts mother of two children with autism spectrum disorders. Her son, Jack, 7, has severe autism, while her daughter, Amy (not pictured), who is 11, has Asperger's. Richard Knox/NPR hide caption

itoggle caption Richard Knox/NPR