Why Pets Have Surprisingly Small Brains
Thanks to 23andMe for sponsoring this video! http://www.23andme.com/minuteearth If you live outside the US, click here: https://www.23andme.com/ When we domesticate an animal species, their...
==========
This video was sponsored by 23andMe.Hi, this is Emily from MinuteEarth.Domestication has puppified dogs, fluffified sheep, and spotified horses – but there’sa less obvious physical change that virtually all domesticated animals share: shrunken brains.Duck brains have shrunk by about 15%, cat brains by 30%, and pig brains by a whopping35%.We’ve even found smaller brains in farmed trout.Which is weird, because in general, the size of animals' brains and the size of their bodiesis super tightly linked – mites have smaller brains than ants, which have smaller brainsthan mice, which have smaller brains than elephants, and so on.The same relationship exists for individuals within species.So, for example, small wolves have smaller brains than big wolves, and sm...
==========
This video was sponsored by 23andMe.Hi, this is Emily from MinuteEarth.Domestication has puppified dogs, fluffified sheep, and spotified horses – but there’sa less obvious physical change that virtually all domesticated animals share: shrunken brains.Duck brains have shrunk by about 15%, cat brains by 30%, and pig brains by a whopping35%.We’ve even found smaller brains in farmed trout.Which is weird, because in general, the size of animals' brains and the size of their bodiesis super tightly linked – mites have smaller brains than ants, which have smaller brainsthan mice, which have smaller brains than elephants, and so on.The same relationship exists for individuals within species.So, for example, small wolves have smaller brains than big wolves, and sm...
