Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109
When a male honey bee climaxes during sex, his testicles explode and then he dies.
27
There's a rare breed of pig that looks like a sheep.
14
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23