> how long it took our species to get where we're at. Barely any? By our reckoning, anatomically modern humans are at most 500kY old, and in that time we manag

> how long it took our species to get where we're at. Barely any? By our reckoning, anatomically modern humans are at most 500kY old, and in that time we managed to spread to the entire planet (and beyond) as a single species. Dinosauria is an entire clade several levels up from mammalia relatively speaking (Aves — every single bird — is a taxonomic class within dinosauria). Basal dinosaurs appeared about 20 million years after the P-T extinction event (251MYA), but they didn’t become the dominant life form until the T-J extinction event (201MYA) wiped out the dominant early archosaurs. And they benefited from a supercontinental stage for their spread.