Cats recognise the voice of their owner, but never evolved to care.
22
The Basenji dog is the only dog that is not able to bark.
4
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
A tortoise named Adwaita lived to 255 years old. To put it into perspective, he was born before the United States of America existed and his death was announced on CNN (1750-2006).
12
A group of pugs is called a grumble.
10