The Basenji dog is the only dog that is not able to bark.
4
Moths are unable to fly during an earthquake.
328
There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10