Season 8 Episode 803 | 26m 46s Video has closed captioning.
Explore a promising new effort to help save California’s endangered condors. Also in this episode, find out how scientists are discovering billions of planets like Earth; learn how sleep helps wash toxic gunk from our brains; and take a dive into the ocean’s mysterious twilight zone, where hundreds of never-before-seen creatures dwell.
Problems Playing Video? | Closed Captioning