Here are a few interesting facts about the bones! As babies we are all born with 300 bones in the body, however once we reach adulthood we only have 206 bones, this is because many of them fuse together to form a single bone. Most of the bones within our bodies are based in our hands, they contain 54 bones, that including the wrists. Our feet however have 26 bones and our faces only 14. Our adult bones acount for only 14 percent of our body weight. Surprisingly although hollow, the strongest bone in the body is the thighbone (the femur) it is even stronger than solid concrete. Although our bones are solid they are actually made up of around 75% water!