The Basenji dog is the only dog that is not able to bark.
4
The largest earthworm on record was found in South Africa and measured 22 feet.
151
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
12
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8
The head of a jellyfish is called the "Bell."
6