> So let's look at the facts. The bones in your body are made from material which has a tensile strength of 150MPa, a strain to failure of 2% and a fracture tou

> So let's look at the facts. The bones in your body are made from material which has a tensile strength of 150MPa, a strain to failure of 2% and a fracture toughness of 4MPa(m)½. For a structural material that's not good. We can make alloy steels that are ten times better in all three of those properties. Regular structural steel, used for all sorts of typical building applications, has a yield strength of 250MPa and an ultimate tensile strength of about 400MPa. So bone with it's 150MPa tensile strength, about 60% that of steel's yield strength, is pretty good! For comparison, typical structural timbers have a tensile strength of around 18MPa.