…and how did it evolve in the first place? Tweet ⇒ ****** Share on FB ⇒ ****** ↓ More info and sources below ↓ Why do we sleep? We spend a third of our lives in slumber, but science has yet to determine exactly why we have do it. Here’s a look at how sleep works, why we’re not getting enough sleep, what happens if you DON’T sleep, and an idea about where sleep came from in the first place. Follow me to The Good Stuff’s sleep playlist: ****** Also check out out BrainCraft: ****** ****** For more, read: “Dreamland: Adventures in the Strange Science of Sleep” by David K. Randall ****** "The Universal Pastime: Sleep and Rest Explained" by Dr Richard Horner ****** Cool research on melatonin in sea worm larvae: ****** Have an idea for an episode or an amazing science question you want answered? Leave a comment or check us out at the links below! Follow on Twitter: ****** ****** Follow on Tumblr: ****** Follow on Instagram: ****** Follow on Snapchat: YoDrJoe ----------------- It’s Okay To Be Smart is written and hosted by Joe Hanson, Ph.D. Follow me on Twitter: @jtotheizzoe Email me: itsokaytobesmart AT gmail DOT com Facebook: ****** For more awesome science, check out: ****** Produced by PBS Digital Studios: ****** Joe Hanson - Creator/Host/Writer Joe Nicolosi - Director Amanda Fox - Producer, Spotzen Inc. Kate Eads - Producer Andrew Matthews - Editing/Motion Graphics/Animation Arts & Labor - Motion Graphics Katie Graham - Camera John Knudsen - Gaffer Theme music: “Ouroboros” by Kevin MacLeod Other music via APM Stock images from Shutterstock, stock footage from Videoblocks (unless otherwise noted)