The Basenji dog is the only dog that is not able to bark.
4
Domestic pigs average a top speed of about 11 miles per hour.
182
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Rex the German Shepherd was a rescue dog with a bad temper. He refused to be fed by humans and would attack strangers, but he’s a changed dog after falling in love with Geraldine the goose!
10
Jumping fleas can accelerate 50 times faster than the space shuttle.
218