Sir David Attenborough at the Beijing Museum of Natural History with fossil of Juramaia, as featured in the Smithsonian Channel series Rise of Animals: Triumph of the Vertebrates. Courtesy Smithsonian Channel hide caption

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Kurt Cobain with daughter Frances. Courtesy of HBO hide caption

itoggle caption Courtesy of HBO

A woman walks past a memorial for some of the victims who are said to have died at the hands of the serial killer dubbed the "Grim Sleeper." Mark Ralston/AFP/Getty Images hide caption

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Cambodian band Baksei Cham Krong. Mol Kamach/Courtesy of Argot Pictures hide caption

itoggle caption Mol Kamach/Courtesy of Argot Pictures

Co-director Bruce Sinofsky attends the Paradise Lost 3: Purgatory press day at HBO Studios on Jan. 6, 2012, in New York City. Michael Loccisano/Getty Images hide caption

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Over a span of six decades, Doris Payne has stolen some $2 million in jewels. She is the subject of a new documentary called The Life & Crimes of Doris Payne: A Tale of Carats, Cons and Creating Your Own American Dream. Courtesy of Treehouse Moving Images hide caption

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Raphael Lemkin is the Polish lawyer and linguist who coined the term "genocide" — and dedicated his life to making genocide recognized as a crime. Copyright by Arthur Leipzig /Courtesy of Howard Greenberg Gallery, New York hide caption

itoggle caption Copyright by Arthur Leipzig /Courtesy of Howard Greenberg Gallery, New York

Jamira, 11, is an aboriginal girl in Australia. "I like being special," she says. "I like being — you know — different than everyone else." Henrik Nordstrom/I Am Eleven hide caption

itoggle caption Henrik Nordstrom/I Am Eleven

Visitors watch an orca performance at SeaWorld in San Diego this year. The company has seen attendance slip in the year since the release of a documentary film critical of the company's captive whale program. Mike Blake/Reuters/Landov hide caption

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A great white shark swims near Guadalupe Island off the coast of Mexico in a promotional image for Discovery Channel's Shark Week in 2013. The network special Megalodon: The Monster Shark Lives opened Discovery's annual Shark Week programming in 2013. Andrew Brandy Casagrande/Discovery Channel/AP hide caption

itoggle caption Andrew Brandy Casagrande/Discovery Channel/AP

The cast and crew of Beyond the Edge re-enacted Sir Edmund Hillary's (Chad Moffitt) historic climb on site at Mount Everest, and at Aoraki/Mount Cook National Park in New Zealand's Southern Alps. Mark Whetu/Sundance Selects hide caption

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Jason DaSilva was on a family vacation in 2006 when he fell and couldn't get up. His multiple sclerosis symptoms have progressed to the point that he can't walk. Factory Release hide caption

itoggle caption Factory Release

Fabien Cousteau sits inside Aquarius Reef Base in 2012. If he is able to remain under water for 31 days, he will have lasted one day longer than his grandfather, Jacques Cousteau. Mark Widick/AP hide caption

itoggle caption Mark Widick/AP

Dean Obeidallah and Negin Farsad, co-directors of The Muslims Are Coming! Shereen Marisol Meraji/Code Switch hide caption

itoggle caption Shereen Marisol Meraji/Code Switch