A lot of the cool things about this story are in the science paper but not the article: They found mile-long tracks at White Sands National Park and determined it was a girl carrying a toddler, shifting the kid from one hip to the other and occasionally putting it down. She walked in a straight line like she knew exactly where she was going, at about 3.8 mph, so a brisk pace, and then followed the same path back a few hours later without the toddler. During the time in between, a giant ground sloth and a mammoth crossed her tracks. The mammoth just kept walking, but the ground sloth sniffed, then stood on its hind legs to look around, seemingly worried about human predation. A whole mysterious story in these tracks—and what happened to the toddler?
such a long walk into the future fossil