It's no coincidence that our bodies feel a little creakier as we age. The trillions of cells that make up our skeleton age too, and some change in ways that weaken the very structure of our bones.

Jeremy Berg does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their ...

The heartbeat is synonymous with life. It’s one of the of the first essential functions to begin during development and to end at death. “The heart is one of the first organs to form and function ...