Did humans live during the ice age?

Yes, they would have to or they would all be 1 year or less old. However, they will not survive deep cold which is why they only thrive in the deep south. There is a place where a small colony has been nurtured in the San Louis Valley in Colorado. The alligator's northern most home is here in North Carolina, and they den up in cold weather as their metabolism slows down. They emerge in spring here, when temps hit the mid sixties.