We’ve all been told to get a good night’s sleep before a test — finally, here’s the reason why. Sleep scientist Matt Walker explains how getting enough sleep affects how our brains store and process memories.

Sleeping with Science, a TED original series, uncovers the facts and secrets behind our nightly slumber. (Made possible with the support of Beautyrest)

Check out more: https://go.ted.com/sleepingwithscience and subscribe to the TED channel: https://www.youtube.com/TED

Hacking your memory — with sleep | Sleeping with Science, a TED series