Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
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
Cats and dogs can hear ultrasound.
350
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
Early American humans hunted car-size armadillos and used their shells for houses.
12
In 2005, in Africa, it was reported that three lions rescued a 12-year-old girl from kidnappers and guarded her for half a day until help came.
46