The longest trail of fossilized human footprints hints at a risky Ice Age trek
The more than 1.5-kilometer-long trail was made by a young adult carrying a toddler

The longest set of human footprints, dated to the Ice Age, were possibly made by a young woman carrying a toddler (illustrated). Additional prints hint that the duo crossed paths with a mammoth (two shown) and a ground sloth.
Karen Carr