Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
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The colossal squid has the largest eyes in the world.
4
Cats recognise the voice of their owner, but never evolved to care.
22
There's a rare breed of pig that looks like a sheep.
14
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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A cat can jump FIVE TIMES as high as it is tall!
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