Only 3% of bird species have penises.
0
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
By putting a frog in a bucket of milk, scientists following up on an ancient Russian way of keeping milk from going sour have identified a wealth of new antibiotic substances.
9
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
There's a competition in Sweden called Kaninhoppning, or rabbit show jumping.
-12
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268