Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13
Early American humans hunted car-size armadillos and used their shells for houses.
12
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
A zoo in China gave a gay penguin couple the opportunity to raise a chick.
11
The head of a jellyfish is called the "Bell."
6
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19