10 Historical Tunnels Dug By Something That Wasn't Human

10 Historical Tunnels Dug By Something That Wasn't Human In the Cradle of Humankind region of Gauteng Province, South Africa, researchers excavating some of the world's most celebrated early hominid sites made a discovery that quietly unsettled the dig teams. Beneath the famous fossil beds, running through compacted ancient sediment, were tunnel networks that stretched for hundreds of metres. They were not made by any geological process. Something had dug them.