Sleep Evolved Before Brains. Hydras Are Living Proof Ifeadi C. 05:42 Feed: All Latest, Zero Tech Blog Some of nature’s simplest animals suggest that sleep evolved long before centralized nervous systems. via Zero Tech Blog Share this Share on FacebookTweet on TwitterPlus on Google+ Related PostsNew York's Vaccine Order Shows How Health Laws Are Failing UsWatch SpaceX Launch a Falcon Heavy on Its First Real MissionAmazon Kindle Review (2019): A Cheaper Way to Read at NightMysterious Hackers Hid Their Swiss Army Spyware for 5 YearsWhat I Learned By Binge-Watching 'Game of Thrones' BackwardA Peek Into the Toolkit of the Dangerous 'Triton' Hackers