MORE FACTS

The only bone fully grown at birth is located in the ear.

Adult human bones account for 14% of the body's total weight.

Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.

Your thigh bone is stronger than concrete

The strongest bone in your body is the femur (thighbone), and it's hollow!

Enamel is hardest substance in the human body.

Fingernails grow nearly 4 times faster than toenails!