Has gender divide always existed in society? Million-year-old footprints reveal surprising answer

Scientists found 1.5 million-year-old footprints at Koobi Fora in Kenya that suggest early humans had a division of labor. Researchers studied 21 tracks from Homo erectus, which showed men and women often moved in separate groups. Dr. Kevin Hatala said, "The sizes of the footprints indicate human-like body sizes."