Cats recognise the voice of their owner, but never evolved to care.
22
Rattlesnake mating sessions have been known to last more than 22 hours.
232
The oldest recorded elephant lived for 82 years.
213
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
The octopus does not have a blind spot.
273
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
Condoms were originally made of animal intestines or linen.
347