Clip: Season 3 Episode 10 | 4m 34s
Less than half a century ago, grizzly bears were on the path to extinction. Now a group of biologists at Yellowstone National Park are placing a watchful eye of grizzly populations by outfitting them with collars to track their every move. By knowing their whereabouts, biologist can help protect grizzlies from existing threats.
Aired: 08/17/17Video has closed captioning.