“In a savage and ever-changing world, some will rise and some will fall. But through it…
Tag: Cretaceous period
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…
An ancient sea once divided North America from north to south; 70-million-year-old creatures from its waters still shimmer like gemstones
Fossils from this period are displayed at the Smithsonian’s National Museum of Natural History. South Dakota…