Area A of the Happisburgh archaeology site in Norfolk, Britain, where coastal erosion has revealed mudflats containing 800-thousand-year-old footprints. Martin Bates/British Museum/EPA/Landov hide caption toggle caption Martin Bates/British Museum/EPA/Landov 13.7: Cosmos And Culture A Prehistoric Family? Looking For Clues In The Mud February 13, 2014 Ancient footprints discovered in Britain show that five individuals of mixed ages took a stroll together 800,000 years ago. Commentator Barbara J. King asks whether it's scientifically credible to consider these individuals a family.