Dire wolves actually existed, living up to 10,000 years ago before going extinct.
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The elephant shrew’s closest relative isn’t a shrew — it’s actually an elephant
9
The elephant brain weighs about 6,000g.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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Rex the German Shepherd was a rescue dog with a bad temper. He refused to be fed by humans and would attack strangers, but he’s a changed dog after falling in love with Geraldine the goose!
10
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
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2