Whales and dolphins can't taste anything other than salt.
11
Penguins have a gland above their eye that turns saltwater into freshwater.
12
The Basenji dog is the only dog that is not able to bark.
4
When cats are happy, they may squeeze their eyes shut.
10
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
5
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23