There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16
In Australia, there are spiders big enough to eat snakes.
20
The elephant brain weighs about 6,000g.
274
When cats are happy, they may squeeze their eyes shut.
10
A domestic cat can sprint at about 31 miles per hour.
274