Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Lurch, a Watusi bull, had the largest horns in the world.
32
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
There are approximately three chickens for every human on Earth.
13
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Only 3% of bird species have penises.
0