Out of the 330 species of turtles and tortoises, over half are threatened with extinction, says conservationist Eric Goode. Gloria Hillard/NPR hide caption

itoggle caption Gloria Hillard/NPR

The fossilized remains of a whale that washed up on a shore in what's now Chile more than 5 million years ago. Vince Rossi/Smithsonian Institution hide caption

itoggle caption Vince Rossi/Smithsonian Institution

Jockeys take their camels home after racing in Egypt's El Arish desert. The annual race draws competitors from around the Middle East, including Saudi Arabia, where camels carry the Middle East Respiratory Syndrome virus. Nasser Nouri/Xinhua /Landov hide caption

itoggle caption Nasser Nouri/Xinhua /Landov

A screen grab from an undercover video released by the Humane Society of the U.S. shows a pig in a gestation crate at Iron Maiden Farms in Owensboro, Ky. Courtesy of The Humane Society of The United States hide caption

itoggle caption Courtesy of The Humane Society of The United States