killed off the dinosaurs meteor strike Dinosaur Extinction, Cretaceous-Tertiary Extinction … ended the reign of the dinosaurs 65 million years ago killed off the dinosaurs Cretaceous-Tertiary http://science.nationalgeographic.co...ur-extinction/ National Geographic tells us: meteor strike meteor strike National Geographic dinosaurs meteor strike meteor strike And then things changed about 65 million years ago meteor strike National Geographic tells us: