There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Sloths take two weeks to digest their food.
243
The Basenji dog is the only dog that is not able to bark.
4
15% of snails survive digestion by birds and are found alive in their droppings, potentially leading to the spread of snail populations.
1
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