66.5 million years ago, a T. rex crossed North America; fossil footprints now show the giant dinosaur walked, not ran

For decades, paleontologists have studied Tyrannosaurus rex (T. rex) through bones, teeth and isolated footprints. Those…

67-million-year-old T. rex fossil ‘Gus’ sold for record $50.1 million at Sotheby’s auction, becomes world’s most expensive dinosaur fossil

67-million-year-old T. rex fossil ‘Gus’ sold for record $50.1 million at Sotheby’s auction, becomes world’s most…