Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
The cat brain weighs about 30g.
167
Rattlesnake mating sessions have been known to last more than 22 hours.
232
The oldest creature ever found was Ming the clam at an admirable 507 years old.
16
In 1955, the citizens of São Paulo were so upset with their government that they elected a rhinoceros named Cacareco (meaning rubbish) to the city council in protest, with over 100,000 votes.
18
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2