A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
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
Condoms were originally made of animal intestines or linen.
347
The largest breed of rabbit is the Flemish Giant.
65
A zoo in China gave a gay penguin couple the opportunity to raise a chick.
11
When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
23