Underreported: The Power of Hippo Sweat

Find out what humans can learn from studying hippo sweat, which may have powerful antibiotic and sunblock properties. Herpetologist Dr. Brady Barr explains more about the promises of hippo sweat, and why he has to don a 200-pound hippo decoy suit in order to collect samples of hippo sweat to be tested.

Dr. Barr stars in the National Geographic Channel's "Dangerous Encounters with Brady Barr: Undercover Hippo," which airs on Sunday, January 20, at 9:00 PM ET/PT.