He eventually brought in other experts from Poland, as well as from Sweden, Greece, the U.S. and England, to help him analyze the footprints and the sediments surrounding them. Together, they determined the tracks were left by ancient human relatives 5.6 million years ago. That would make them the oldest human-like footprints in the world — two million years older, in fact, than the oldest found in Africa, long considered the “cradle of humankind.”
[Gerard] Gierlinski said it could suggest an unexpected and untold part of the story of where humans came from. “It’s a new frontier in the study of our ancestors,” he said.