Seymour Simon has written over 200 award-winning science books about animals, anatomy, astronomy, earth science, and vehicles!

• Six tiny muscles hold each eyeball steady in the sockets of your head.
• The ears contain the three smallest bones in the body: the hammer, anvil, and stirrup.
• In addition to hearing, ears help you to keep your balance.
• Without the brain, we wouldn’t be able to see or hear.