Rattlesnake mating sessions have been known to last more than 22 hours.
232
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
The male seahorse carries babies and 'gives birth' to them instead of the female.
7
A dairy cow can produce more milk when listening to music.
446
There's a competition in Sweden called Kaninhoppning, or rabbit show jumping.
-12
Only 3% of bird species have penises.
0