The asteroid collision that killed off the dinosaurs 65.5 million years ago also nearly wiped out snakes and lizards - including a newly-identified species of lizard named for President Obama.
Biologists who released lizards on several uninhabited islands in the Bahamas have been able to observe an evolutionary effect in action.
If you thought reptiles were some of the least intelligent creatures in the animal kingdom, well, you might want to reconsider.
For some people, fruit flies and a tank just aren't enough. Two Dartmouth biologists have been using whole islands in the Caribbean to investigate evolution in lizards.