The initial change in primate [eyes] ... occurred when they had to deal with constricting snakes, probably about 90 million years ago,Isbell said.
The initial change in primate [eyes] ... occurred when they had to deal with constricting snakes, probably about 90 million years ago,Isbell said.
“灵长类眼睛最初的改变大概发生在9000万年前，当他们必须要对付蛇的时候。”