Why does many sites always said the femur is the strongest and heaviest bone in the human body? I know the femur is the longest bone, but is it really that the femur is the strongest and heaviest bone in human body? This is a link where it is said that human femur and humerus are nearly equal in strength (http://informahealthcare.com/doi/pdf/10.3109/17453676808989447) There are also numerous sites that said actually the tibia is the strongest and heaviest bone, even stronger and heavier than femur. But without more detail about the femur and tibia are the strongest and heaviest bone, I think our humerus or even other bone can get more robust, stronger, heavier and denser than the femur or tibia, under some kind of stress. Well, again though, I wouldn't quote me on this, as I'm sure there are people here on this forum that are more knowledgeable about this stuff than I am. Can someone give more detailed answers regarding this?