The Basenji dog is the only dog that is not able to bark.
4
The elephant brain weighs about 6,000g.
274
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
Lurch, a Watusi bull, had the largest horns in the world.
32
Tigers can see 6 times better at night than humans.
305
Allegedly, Chrysippus, the Greek philosopher, died of laughter after getting his donkey drunk and watching it try to eat figs.
47
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4