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Ars Technica
Aug 15, 2017, 12:22 pm76 ptsEnlarge / An archaeological sample with traces of bone-on-bone contact. (credit: Heli Maijanen) Painful, stiff, and grating knees may not just be a sign of aging—they may also be a sign of the times. Degenerative knee arthritis, or knee osteoarthritis (OA), seems to be on the rise. Since the early part of…
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