If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
The elephant brain weighs about 6,000g.
274
The Basenji dog is the only dog that is not able to bark.
4
The Platypus used to be considered a myth like Bigfoot and the Yeti.
18
Giant Anteaters' front legs look like a panda.
48
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