Only 3% of bird species have penises.
0
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
The largest breed of rabbit is the Flemish Giant.
65
When a male honey bee climaxes during sex, his testicles explode and then he dies.
27