Matter: Hot Heads: Why Mammals Need R.E.M. Sleep Sleeping fur seals toggle between two brain patterns: one while at sea, the other on land. Researchers suggest that R.E.M. sleep serves to warm the brain. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Dark Side of the Moon BOMBSHELL: Chinese mission uncovers lunar secrets of Moon's far sideMars photos: Stunning new pictures of Red Planet releasedYellowstone National Park hit by 73 EARTHQUAKES near super-volcano - sign of an eruption?SpaceX to Launch 60 Starlink Satellites, Aiming to Build Orbital InternetSpaceX to Launch 60 Starlink Satellites, Aiming to Build Orbital InternetSpaceX DELAY StarLink satellite launch over 'excessive wind at Florida launch site'
