The Basenji dog is the only dog that is not able to bark.
4
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
Whales and dolphins can't taste anything other than salt.
11
Queen ants have one of the longest life-spans of any known insect - typically up to 30 years. Western harvester ant queens can live up to 40 years!
2
When cats are happy, they may squeeze their eyes shut.
10
Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
23