Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
When cats are happy, they may squeeze their eyes shut.
10
There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
Ants have tiny magnetic compasses in their antennae which help them navigate.
9
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
The elephant brain weighs about 6,000g.
274