People with tails? No, because of this ancient genetic mutation
It is an interesting thought experiment to ponder whether humans could have evolved with tails. The Na'vi people of "Avatar," alas, are science fiction.
A southern right whale performs a tail slap just off the shore of Puerto Piramides, Argentina, June 26, 2007.(photo credit: REUTERS/Maximiliano Jonas)ByREUTERS
