Cats recognise the voice of their owner, but never evolved to care.
22
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Baks the blind boxer has a seeing eye goose named Buttons; a four-year-old goose who leads the pup around everywhere either by hanging onto him with her neck, or by honking to tell him which way to go.
16
Bats sleep 18-20 hours per day.
5
Allegedly, Chrysippus, the Greek philosopher, died of laughter after getting his donkey drunk and watching it try to eat figs.
47
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79