via smartplanet.com
http://www.smartplanet.com/video/ghoulish-reasons-why-bones-break-easily-afte...
It may be a bone-chilling fact, but we know that the chance of breaking a bone increases significantly after age 50, especially for women. We know bones lose mass as they age. However, a scientist at Lawrence Berkeley National Laboratory says what makes them become brittle is more complicated than that. He literally looks inside our skeletons to discover what else happens to bones as they age in hopes of finding more effective ways to make them strong.
