The cat brain weighs about 30g.
167
The reindeer is the only mammal that can see UV light.
17
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
A puppy is born blind, deaf, and toothless.
16
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
