Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45
Ants have tiny magnetic compasses in their antennae which help them navigate.
9
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
23
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12