Armadillos can get leprosy.
13
A rodent's teeth never stop growing.
16
Only 3% of bird species have penises.
0
On average, there's 300 billion neurons in the octopus brain.
129
The world's largest amphibian is the giant salamander. It can grow up to 5 ft. in length.
66
The average housefly weighs 10 to 15 millionths of a pound.
33