Ancient footprints saved despite being washed away thanks to 3D mapping

Archaeologists have discovered some of the oldest human footprints in the world during a dig on a beach on the Norfolk coast. The prints, thought to be more than 900,000 years old, were found in silt on the beach at Happisburgh. Scientists believe the prints, which were probably made by five different people, are direct evidence of the earliest known humans in northern Europe.