Clinical studies support the muscle dysfunction hypothesis over the wear and tear hypothesis. Osteoarthritis (OA) often limits activities of daily living—for example, climbing stairs, dressing 1 —and ...

Chromatin, the mix of DNA and protein that houses each cell's genome, is more resilient to aging than previously thought, suggests a study published in the Journal of the American Chemical Society by ...

Tribology: The study of friction, wear, and lubrication between surfaces in relative motion. Chaos Theory: A branch of mathematics that studies complex systems whose behavior is highly sensitive ...