Only 3% of bird species have penises.
0
Cats sleep for 70% of their lives.
8
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Gorillas can catch human colds and other illnesses.
205
The reindeer is the only mammal that can see UV light.
17