The reindeer is the only mammal that can see UV light.
17
Cats and dogs can hear ultrasound.
350
Sloths take two weeks to digest their food.
243
The most expensive cow in the world was sold in 2009 for $1.2 million.
-3
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6