One giant step: first known adult T rex footprints found in North Dakota

The 23ft-long trackway, consisting of four three-toed footprints, two left and two right, date from 66.5m years ago The first known series of footprints from an adult Tyrannosaurus rex has been found in North Dakota by a team of scientists. The 23ft-long trackway – consisting of four three-toed footprints, two left and two right – was first identified in the south-west of the state, in the dinosau