Lobsters have blue blood.
476
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
Cows can sleep standing up, but they can only dream lying down.
745
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
A scorpion can hold its breath for up to 6 days.
19
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
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