Jeffrey Iliff (left), a brain scientist at Oregon Health & Science University, has been studying toxin removal in the brains of mice. He'll work with Bill Rooney, director of the university's Advanced Imaging Research Center, to enroll people in a similar study in 2016. Courtesy of Oregon Health & Science University hide caption

toggle caption Courtesy of Oregon Health & Science University

Lack Of Deep Sleep May Set The Stage For Alzheimer's

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Once the roots of the Eskimo potato got too tough to eat, Christopher McCandless started collecting the seeds in a plastic bag, says author Jon Krakauer. Photo courtesy of McCandless family hide caption

toggle caption Photo courtesy of McCandless family