Michel Jouvet, Who Unlocked REM Sleep’s Secrets, DEAD @ 91

Discovered the part of the brain that controls rapid eye movement, and through research helped define what REM sleep was and how it's a unique state of consciousness common to humans and animals alike.  

nytimes.com/2017/10/11/obituaries/michel-jouvet-who-unlocked-rem-sleeps-secrets-dies-at-91.html?rref=collection%2Fsectioncollection%2Fobituaries

English subtitles available