Bats sleep 18-20 hours per day.
5
Condoms were originally made of animal intestines or linen.
347
The cat brain weighs about 30g.
167
In Australia, there are spiders big enough to eat snakes.
20
Mosquitoes don't just bite you, they also pee on you.
11
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4