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5 Weird Involuntary Behaviors Explained!

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate Why we yawn, why we hiccup, twitchy eyes (and more)! Don’t miss our next video! SUBSCRIBE! ►► http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter:   / jtotheizzoe   Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram:   / jtotheizzoe   Our bodies do a lot of weird things, and many of them are completely involuntary. Why do we often jerk our bodies awake right before falling asleep? Why do we yawn? Why do we hiccup? Why do some people sneeze when they look at the sun? And why does your eye twitch? This week we'll look at the science behind these crazy involuntary behaviors! MY T-SHIRT: http://www.cognitive-surplus.com/prod... Read more: Aristotle's "Book of Problems" free online: http://www.gutenberg.org/files/12699/... (it was probably not written by Aristotle, but instead collected after his death) Yawns: http://www.bbc.com/future/story/20140... Eye twitches: http://www.straightdope.com/columns/r... Sun sneezes: http://www.ncbi.nlm.nih.gov/pmc/artic... Hiccups: http://www.bbc.com/future/story/20140... Sleep twitches: http://www.bbc.com/future/story/20120... http://www.bbc.com/future/story/20120... Post-micturition convulsion syndrome: http://io9.com/5810102/the-science-of... Have an idea for an episode or an amazing science question you want answered? Leave a comment below! ----------------- It's Okay To Be Smart is written and hosted by Joe Hanson, Ph.DFollow me on Twitter: @jtotheizzoe Email me: itsokaytobesmart AT gmail DOT com Facebook:   / itsokaytobesmart   Google+ https://plus.google.com/+itsokaytobes... For more awesome science, check out: http://www.itsokaytobesmart.com Produced for PBS Digital Studios Joe Hanson - Creator/Host/Writer Joe Nicolosi - Director Amanda Fox - Producer, Spotzen IncKate Eads - Associate Producer Andrew Matthews - Editing/Motion Graphics Katie Graham - Director of Photography John Knudsen - Gaffer Dalton Allen - Post-Production Intern Theme music: "Ouroboros" by Kevin MacLeod Other music via APM Stock images from Shutterstock ----------------- Last week's video: There's no such thing as cold:    • There's No Such Thing As Cold   More videos: Why Are Some People Left-Handed?    • Why Are Some People Left-Handed?   Why Did We Blow on NES Games?    • Why Did We Blow On Nintendo Games?   The Science of Game of Thrones -    • The Science of Game of Thrones   There Was No First Human -    • There Was No First Human   How The Elements Got Their Names -    • How The Elements Got Their Names