In the 1960s, Australian coal miners stumbled across huge, bird-life footprints protruding from the ceiling of their subterranean work site in south-eastern Queensland. The marks, more than a foot long, belonged to a creature that trekked across swampy land around…
Tag: fossils
Tyrannosaurus rex was the apex predator of the Cretaceous period, around 66 to 68 million years ago. But scientists had never calculated the total number of T. rexes there ever were—until now. A new study estimates that about 2.5 billion…