Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
A 42-foot sperm whale has about 7 tons of oil in it.
209
Mahatma Gandhi used to travel with his goat so that he could have fresh milk.
11
Bats sleep 18-20 hours per day.
5
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17
When cats are happy, they may squeeze their eyes shut.
10
Condoms were originally made of animal intestines or linen.
347
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9