Imagine modern-day field biologists being sent back in time 66 million years ago to North Dakota on the brink of the end-Cretaceous extinction. Wandering the pine rainforests and palmetto-choked ...
Explore the age of the dinosaurs. Discover what the prehistoric world was like and how it changed between when dinosaurs first appeared and the mass extinction at the end of the Cretaceous Period. Non ...
This may help explain why Ptychodus sharks appear to have died out some time before the end-Cretaceous extinction event that wiped out the non-avian dinosaurs, he says.