PHILADELPHIA, December 27, 2017

Crocodiles, alligators, caimans—these creatures have flourished for 20 million years. How do they do it? Crocs: Ancient Predators in a Modern World, an exhibit opening Saturday, Feb. 3 at the Academy of Natural Sciences of Drexel University, explores this fascinating group of animals.

Here are some fascinating facts about crocs that many people don’t know. Test your knowledge.

1. ___________ was an extinct croc that may have eaten big dinosaurs.

   A: Deinosuchus

2. TRUE or FALSE? Crocodilians are more closely related to birds than they are to lizards.

   A: True

3. TRUE or FALSE? Croc fossils have been found on every continent except Antarctica.

   A: False, every continent including Antarctica

4. Sarcosuchus imperator had more than __________ teeth lining its massive jaws.

               A: 100

5. In cold weather American alligators go through a dormant state called ___________.

   A: Brumation

6. ___________ are bony disks embedded in the skin of crocodilians.

   A: Osteoderms

7. TRUE or FALSE? A croc may go through as many as 15,000 teeth in its lifetime.

   A: False, more like 3,000-4,000

8. Crocodilians communicate with sight, sound, ___________, and ___________.

   A: Chemical cues and touch

9. __________ species of crocs are now considered critically endangered.

   A: 7

10. TRUE or FALSE? People living in Australia are more likely to drown than to be killed by a croc.

    A: True

11. What was the first animal to be removed from the U.S. endangered species list?

A: American alligator