LINKS TO LEARN: http://www.twitter.com/Tweetsauce http://www.Facebook.com/VsauceGaming VSAUCE SHIRTS: http://www.districtlines.com/vsauce music by http://www.Soundcloud.com/JAKECHUDNOW intro animation by null "Big Dog" Crazy LEG Robot: https://www.youtube.com/watch?v=W1czBcnX1Ww Wheeled-Animal STRAIGHT DOPE: http://www.straightdope.com/columns/read/1151/why-has-no-animal-species-ever-evolved-wheels Wheeled-Animal WIKI: http://en.wikipedia.org/wiki/Rotating_locomotion_in_living_systems WHEEL SPIDER: https://www.youtube.com/watch?v=V4odlo0Afjs Bacterial Flagellum: http://en.wikipedia.org/wiki/Flagellum#Bacterial Wheel and Axel Animation: https://www.youtube.com/watch?v=TfZvamONFFs LITTER: http://en.wikipedia.org/wiki/Litter_(vehicle) Earliest evidence we have of humans using wheels: http://en.wikipedia.org/wiki/Bronocice_pot Dawkins Wheeled-Animal Article: http://dlss.channelwood.org/private/ebooks/atheisme/Why%20dont%20animals%20have%20wheels%20-%20Dawkins%20.pdf "why don't animals have wheels?" animals wheels locomotion slither fly walk swim dawkins wtf wierd biology roll