Bats sleep 18-20 hours per day.
5
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
Dogs sometimes fake being sick to get attention.
26
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13