Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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The ancestor of all domestic cats is the African Wild Cat which still exists today.
12
Cows can sleep standing up, but they can only dream lying down.
745
Cats and dogs can hear ultrasound.
350
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
The Savannah is the largest domestic cat breed. It resembles a small leopard and behaves like a dog. They can grow up to 40 lbs, have an eight foot vertical jump, and can be trained to walk on a leash and play fetch.
17
There's a competition in Sweden called Kaninhoppning, or rabbit show jumping.
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