Why Do We Have Such Crooked Teeth?
- Опубликовано: 11 мар 2017
- A lot of humans need or want braces to fix their crooked teeth, but why do you never see a dog walking down the street with headgear? Our ancient ancestors and mac and cheese may be to blame!
*Correction: Even though hyraxes look similar to rodents, they're actually in the order Hyracoidea, not Rodentia! They're more closely related to elephants and manatees than to mice and guinea pigs.*
Hosted by: Hank Green
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- Длительность: 2:58
- SciShow science Hank Green education learn teeth hunter gatherer hunter-gatherer human biology braces animation agriculture early man anthropology skull bone food cooking dentist jaw chewing evolution genetics development developmental plasticity pasta meat macaroni and cheese vegetable beaver