TIL certain East Asian physical traits, like thicker hair, more sweat glands, distinct teeth, and smaller breasts, stem from a gene mutation about 35,000 years ago. Africans and Europeans usually carry the ancestral version of the gene, but in most East Asians, one of the DNA units has mutated.

https://en.wikipedia.org/wiki/Ectodysplasin_A_receptor
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gp9l4j/til_certain_east_asian_physical_traits_like/