Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Published on Dec 28, 2017
Sleep is universal in the animal kingdom, but each species slumbers in a different — and often mysterious — way. Some animals snooze with half their brain, while others only sleep for two hours a day (without even suffering sleep deprivation!). Ed Yong guides us through the latest research on how creatures catch their z’s.