Try 23andMe: www.23andme.com/okay Don’t miss our next video! SUBSCRIBE! ►► bit.ly/iotbs_sub ↓↓↓ More info and sources below ↓↓↓ Since the days of Ancient Greece, philosophers and scientists have been wondering: What is space? Is the absence of things… a thing? These questions continued to fascinate physicists in the modern era, leading Isaac Newton, Ernst Mach, and Albert Einstein to wonder about the true nature of the fabric of the cosmos. The search for an answer led them to some of the greatest theories in physics. This week, we ask if space and time are really real, and how they come together to make “spacetime”! ----------- READ MORE: “The Fabric of the Cosmos” by Brian Greene amzn.to/2tF9fZO (Public library: www.worldcat.org/oclc/681349969) ----------- FOLLOW US: Merch: store.dftba.com/collections/its-okay-to-be-smart Facebook: www.facebook.com/itsokaytobesmart Twitter: @okaytobesmart @DrJoeHanson Tumblr: www.itsokaytobesmart.com Instagram: @DrJoeHanson Snapchat: YoDrJoe ----------- It’s Okay To Be Smart is hosted by Joe Hanson, Ph.D. Director: Andrew Matthews Writer: Andrew Matthews Producer/editor/animator: Andrew Matthews Producer: Stephanie Noone and Amanda Fox Produced by PBS Digital Studios Music via APM Stock images from Shutterstock www.shutterstock.com

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