“Specifically, obligate bipedalism has long been suspected to be an important aetiological factor for acquired spinal diseases that afflict our species because of the types of stresses it puts on our spines.” PainEvolutionHumanSpineHomo SapiensBipedalism Book:Palaeopathology and Evolutionary Medicine: An Integrated Approach Source: Palaeopathology and Evolutionary Medicine: An Integrated Approach