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PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY↓ More info and sources below ↓Uploaded 17-03-21We’re on PATREON! Join the community ►► https://www.patreon.com/itsokaytobesmartSUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_subCould humans ever evolve to have wings? Why don’t fish have propellers? Why don’t tigers have wheels? Why don’t zebras have laser turrets? These might all seem like stupid questions (and maybe they are!) but they can teach us a lot about how evolution actually works, and how it doesn’t work. References: https://sites.google.com/view/whatisimpossible-references/home-----------Big Thank you to our Brain Trust Patrons:Roy LasrisJavier Sotodani bowmanDavid JohnstonAhmed ElkhananyZenimalSalih ArslanBaerbel WinklerRobert YoungAmy SowadaBenjamin TeinbyEric MeerJay StephensPeter EhrnstromDustinMarcus TuepkerKaren HaskellAlecZeroDiego LombeidaJoin us on Patreon! https://patreon.com/itsokaytobesmartTwitter http://www.twitter.com/DrJoeHansonhttp://www.twitter.com/okaytobesmart Instagram http://www.instagram.com/DrJoeHanson http://www.instagram.com/okaytobesmart Merchhttps://store.dftba.com/collections/its-okay-to-be-smartFacebookhttps://www.facebook.com/itsokaytobesmartpbs/ Learn more about your ad choices. Visit megaphone.fm/adchoices Learn more about your ad choices. Visit megaphone.fm/adchoices
