Scientists in England have found human footprints that are at least 800,000 years old, the earliest evidence of human life outside of Africa. The team discovered the footprints in estuary mud in Happisburgh, on England's east coast. The prints are "a tangible link to our earliest human relatives," says British Museum scientist Nick Ashton. The scientists believe the footprints may be related to Homo antecessor, a.k.a. "pioneer man," which died out 800,000 years ago.