Seals swim among the docked boats at Chatham's fish pier, waiting for a free meal. Curt Nickisch for NPR hide caption

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Shanthi explores her yard at the Smithsonian National Zoo in Washington, D.C., in 2010. The 36-year-old Asian elephant loves blowing into a harmonica. Mehgan Murphy/Smithsonian Institution hide caption

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Matt and Paula Wilson (in background) clear rattlesnakes from a field in Pennsylvania. They work as snake wranglers, clearing areas for natural gas company employees. Scott Detrow/WITF hide caption

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A security guard opens the gate at the Central Valley Meat Co., the California slaughterhouse recently shut down by federal regulators after they received a graphic video of cows being mistreated. Gosia Wozniacka/AP hide caption

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Tilman, Arlington National Cemetery, Arlington, Virginia, 2012 Charlotte Dumas/Courtesy of the Corcoran Gallery of Art hide caption

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A school of Blue Tang fish swimming together off the Caribbean island of Bonaire. It has long been assumed that the schooling behavior of fish evolved in part to protect animals from being attacked by predators. David J. Phillip/AP hide caption

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A newly discovered disease in boa constrictors could provide the missing link in the latent Ebola virus. hide caption

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