The popular mental image of the Mesozoic Era treats it as a single long period in which dinosaurs lived together, in roughly the configurations that toy companies have arranged them. Tyrannosaurus rex and Stegosaurus are among the most familiar pairings, often shown facing off in films, books, and the plastic dinosaur sets that have been [...] The post Tyrannosaurus rex lived closer in time to humans than to Stegosaurus — the gap between T. rex and the present day is about 66 million years, whil