A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The reindeer is the only mammal that can see UV light.
17
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2
There's a rare breed of pig that looks like a sheep.
14
A dairy cow can produce more milk when listening to music.
446
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
Dogs have been man's pet for over 14,000 years.
224