The Basenji dog is the only dog that is not able to bark.
4
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Tigers can see 6 times better at night than humans.
305
In 1955, the citizens of São Paulo were so upset with their government that they elected a rhinoceros named Cacareco (meaning rubbish) to the city council in protest, with over 100,000 votes.
18