Using grizzly bear hair, Scientists find bears get most of the nitrogen in their bodies from salmon. HOW NATURE WORKS AIRS SUNDAY MARCH 12 at 8/7c. ➡ Subscribe: bit.ly/NatGeoWILDSubscribe ➡ Watch all clips from Destination Wild here: bit.ly/DestinationWild About Nat Geo Wild: Welcome to a place so wild, anything can happen. Nat Geo Wild is the network all about animals from National Geographic, where every story is an adventure and your imagination is allowed to run wild. Get More Nat Geo Wild: Official Site: bit.ly/NatGeoWILD Facebook: bit.ly/NGWFacebook Twitter: bit.ly/NGWTwitter Instagram: bit.ly/NGWInstagram Scientists Use Salmon Guts to Study Bears | Destination WILD youtu.be/AnafQ3fVUXs Nat Geo Wild www.youtube.com/user/NatGeoWild