Numberphile

More on numerosity and number cognition with Brian Butterworth - this time discussing research with animals. More links & stuff in full description below ↓↓↓ A little bit of extra footage on why they do this: http://youtu.be/VuHGLBMZywo An earlier video with Brian on dyscalculia: http://youtu.be/p_Hqdqe84Uc And one on numbers and brains: http://youtu.be/n3x8fIdsla4 NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Videos by Brady Haran Patreon: http://www.patreon.com/numberphile Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/ Brady's latest videos across all channels: http://www.bradyharanblog.com/ Sign up for (occasional) emails: http://eepurl.com/YdjL9 Numberphile T-Shirts: https://teespring.com/stores/numberphile Other merchandise: https://store.dftba.com/collections/numberphile