A paleontologist has discovered a gigantic footstep nearly everyone likely left by a very tall tyrannosaur as it crushed the Earth 65 million years ago.

The footstep, which measures about 2.5 feet (74 centimeters) in length, was found in rock in Montana's Hell Creek creation, a well-known site for Tyrannosaurus rex fossil.

"We are moderately convinced that it's been made by a theropod, or rapacious dinosaur," thought paleontologist Phillip Manning of the University of Manchester in England, who was part of the group that found the step.

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