A blue whale's heart is the size of a Volkswagen Beetle!
37
Bats sleep 18-20 hours per day.
5
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Sloths take two weeks to digest their food.
243
Hyenas regularly eat the feces of other animals!
-1
If NASA sent birds into space they would soon die; they need gravity to swallow.
146
A species of earthworm in Australia grows up to 10 feet in length.
10
Mosquitoes don't just bite you, they also pee on you.
11