Healthy diets help prevent, even reverse, some health conditions. Dr. Dean Ornish believes it can also do the same for cancer. Courtesy of TED hide caption

itoggle caption Courtesy of TED

Mineral supplements, ape-style: A female chimp called Kana eats clay in the Budongo Forest of Uganda. A.Schel/Budongo Conservation Field Station/Animal Ecology, Utrecht University, The Netherlands hide caption

itoggle caption A.Schel/Budongo Conservation Field Station/Animal Ecology, Utrecht University, The Netherlands

The Ensatina salamander, a lungless species common along the U.S. West Coast, is one of hundreds of species of salamanders endemic to North America threatened by an emerging infectious pathogen. Courtesy of Tiffany Yap hide caption

itoggle caption Courtesy of Tiffany Yap
Hanna Barczyk for NPR

A photo released by Virgin Galactic shows a badly injured SpaceShipTwo pilot Peter Siebold drifting under his parachute after last October's accident that destroyed the spacecraft during a test flight. Mark Greenberg/Virgin Galactic hide caption

itoggle caption Mark Greenberg/Virgin Galactic

Lake herring roe at the Dockside Fish Market in Grand Marais, Minn. Some workers at the market call it "Lake Superior Gold." Derek Montgomery for NPR hide caption

itoggle caption Derek Montgomery for NPR

Star Trek's Mr. Spock and Captain Kirk never even lose pocket change when they use a transporter to get from TV's Starship Enterprise to distant worlds. What gives? Paramount Television/The Kobal Collection hide caption

itoggle caption Paramount Television/The Kobal Collection