>>21861741>>21861753Differences in the thigh bone between the races as a response to changes in the pelvic bone to give birth to big brained babies.
Fig. 7 illustrates the curvature of the femur or thighbone (leg trait 34). With a widening pelvis, the thighbone exits the pelvis at a wider angle and so has to curve back inwards to make contact with the weight bearing knee, near the center of gravity. East Asians average greater femoral curvature than do Whites, who average greater femoral curvature than do Blacks. The curving of the femur, in turn, led to the formation of the linea aspera (Leg Trait 33), which is a pilaster (ridge) that prevents the bone from breaking due to bending stresses, and on which the races also differ in the predicted direction.
Cope and seethe
