Rattlesnake mating sessions have been known to last more than 22 hours.
232
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
Macaques monkeys in Japan learned to steal purses and wallets, take out the coins, and use them to buy drinks and snacks from vending machines.
26
The Basenji dog is the only dog that is not able to bark.
4
Cats sleep for 70% of their lives.
8
The CIA once spent $20 million on a cat equipped with gear to spy on the Soviets, but it was hit by a taxi.
328
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2