Penguins have a gland above their eye that turns saltwater into freshwater.
12
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
There's a rare breed of pig that looks like a sheep.
14
Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
5