The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
In 2011, a male tiger in India adopted a litter of orphaned cubs, taking on the role of ‘mother’. Wildlife officials say such behavior had never been observed before.
9
Bats sleep 18-20 hours per day.
5
A cow produces around 200,000 glasses of milk in her lifetime.
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