One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
Jaguars frequently get high by eating hallucinogenic roots, which also increases their senses for hunting.
6
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
When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
23
The largest breed of rabbit is the Flemish Giant.
65