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

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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 dinosaur fossil area known as Hell Creek Formation, last year by researchers from the Denver Museum of Natur