Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Rattlesnake mating sessions have been known to last more than 22 hours.
232
15% of snails survive digestion by birds and are found alive in their droppings, potentially leading to the spread of snail populations.
1
Cows can sleep standing up, but they can only dream lying down.
745
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
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Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13
When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
5