Wes Craven's most memorable creation may have been knife-fingered nightmare Freddy Krueger. The Kobal Collection hide caption

itoggle caption The Kobal Collection

Oliver Sacks was an author, physician and a professor of neurology at the New York University School of Medicine. Chris McGrath/Getty Images hide caption

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Renowned British neurologist and author Oliver Sacks, pictured in London in 1983, died Sunday of cancer. He was 82. United News/Popperfoto/Getty Images hide caption

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Neurologist Dr. Oliver Sacks speaks at Columbia University in June 2009 in New York City. Sacks, a prolific author and commentator, has died at age 82. Chris McGrath/Getty Images hide caption

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People attend a candlelight vigil in front of the WDBJ-TV station in Roanoke, Va. a day after reporter Alison Parker and cameraman Adam Ward from the station were killed during a live broadcast. Don Petersen/AP hide caption

itoggle caption Don Petersen/AP