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from Live Science

Bone Density Drop in Modern Humans Linked to Less Physical Activity

Relatively sedentary human agriculturalists (right) have more lightly built skeletons compared to more mobile foragers (left). Pictured are 2D microCT images through the femoral head at the hip joint showing differences in bone structure.<br />

from Live Science

Bone Density Drop in Modern Humans Linked to Less Physical Activity

3D renderings of the femoral head at the hip joint. The femoral head has been sectioned to reveal the 3D volumes of trabecular bone for hunter-gatherers (top) and agriculturalists (bottom)..<br />

from Live Science

Bone Density Drop in Modern Humans Linked to Less Physical Activity

A new study finds that bone joint density remained high throughout human evolution spanning millions of years, until it decreased significantly in recent modern humans, probably as a result of an increasingly sedentary lifestyle. From left to right: modern chimpanzee, Australopithecus, Neanderthal, and modern human.