There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
The male seahorse carries babies and 'gives birth' to them instead of the female.
7
When you shave a guinea pig it looks like a little hippo.
19