The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
The reindeer is the only mammal that can see UV light.
17
Cats recognise the voice of their owner, but never evolved to care.
22
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25