A Brief History Of (Keeping) Time
From Be Smart. · 7:58
Show by Joe Hanson
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonateUploaded 17-10-17A brief history of time…Don’t miss our next video! SUBSCRIBE! ►► http://bit.ly/iotbs_sub ↓↓↓ More info and sources below ↓↓↓How did we come up with our system of telling time? Why do we divide the day into 24 hours of 60 minutes each, and put 60 seconds in each minute? Where does the definition of a second come from? And who decides what clock shows the correct time? There’s clearly a lot of questions when it comes to time.READ MORE:“Galileo’s Pendulum” - Roger Newton http://amzn.to/2yQri5E “Revolution in Time” - David Landes http://www.worldcat.org/oclc/890167780 -----------FOLLOW US:Merch: https://store.dftba.com/collections/its-okay-to-be-smart Facebook: http://www.facebook.com/itsokaytobesmartTwitter: @okaytobesmart @DrJoeHansonTumblr: http://www.itsokaytobesmart.com Instagram: @DrJoeHanson-----------It’s Okay To Be Smart is hosted by Joe Hanson, Ph.D.Director: Joe NicolosiWriter: Matt Caplan, Ph.D. and Joe Hanson, Ph.D.Editor/animator: David SchulteProducer: Stephanie Noone and Amanda FoxProduced by PBS Digital StudiosMusic via APMStock images from Shutterstock http://www.shutterstock.com Learn more about your ad choices. Visit megaphone.fm/adchoices Learn more about your ad choices. Visit megaphone.fm/adchoices
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