Cows can sleep standing up, but they can only dream lying down.
745
There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
40
When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
23
A cat can jump FIVE TIMES as high as it is tall!
371
Mosquitoes don't just bite you, they also pee on you.
11
Bats sleep 18-20 hours per day.
5
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2