The cat brain weighs about 30g.
167
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Squirrels forget where they hide about half of their nuts.
698
Cats and dogs can hear ultrasound.
350
When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
23
Bats sleep 18-20 hours per day.
5