Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
23
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
Sheep, goats, octopuses, and toads have rectangular pupils.
7
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17