The cat brain weighs about 30g.
167
A group of unicorns is called a blessing.
304
The male seahorse carries babies and 'gives birth' to them instead of the female.
7
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
In Australia, there are spiders big enough to eat snakes.
20
The oldest creature ever found was Ming the clam at an admirable 507 years old.
16