Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
The male seahorse carries babies and 'gives birth' to them instead of the female.
7
Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
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Cows can sleep standing up, but they can only dream lying down.
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An average cat has 1-8 kittens per litter and can have 2-3 litters per year. During her productive life, one female cat could have more than 100 kittens. A single pair of cats and their kittens can produce as many as 420,000 kittens in just 7 years.
10