6,000-Year-Old Knee Joints Suggest Osteoarthritis Isn't Just Wear And Tear A new study from Harvard University which looked at more than 2,000 skeletons from cadaveric and archaeological collections across the United States, is the first to definitively show that knee osteoarthritis prevalence has dramatically increased in recent decades. The prevalence of knee arthritis among people in the United States has doubled since the start of World War II. This may seem counter-int