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

Ice Age woman carrying a toddler illustration

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

On a day during the late Ice Age, a young adult or teen carrying a toddler hustled across a muddy flat where mammoths and giant sloths roamed.