Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
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
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
The ancestor of all domestic cats is the African Wild Cat which still exists today.
12
A lion in the wild usually makes no more than twenty kills a year.
186
If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
A group of pugs is called a grumble.
10