The elephant brain weighs about 6,000g.
274
Cats and dogs can hear ultrasound.
350
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
Allegedly, Chrysippus, the Greek philosopher, died of laughter after getting his donkey drunk and watching it try to eat figs.
47
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2