“…Although the study of bone loss in past populations has been investigated using a range of methods, the prevalence of the disease in the past ultimately remains unclear (Agarwal, ; Brickley & Agarwal, ; Brickley & Ives, ). While bone loss in adulthood is universal and has been shown in every study (Agarwal, ), typical patterns of postmenopausal bone loss seen in modern Western women are often not seen in past populations (Agarwal, ; Agarwal & Grynpas, ; Glencross & Agarwal, ; Grynpas, ; Nelson, Sauer, & Agarwal., ; Robling & Stout, 2004). For example, bone loss is often seen at younger ages and in both sexes (Agarwal, ; Agarwal & Grynpas, ; Ekenman, Eriksson, & Lindgren, ; Holck, ; Lees, Molleson, Arnett, & Stevenson, ; Weaver, ).…”