Most people exhibit hand preference for their daily activities and object manipulations, but it has long been a mystery to scientists as to how and why human handedness exists. Studies from different areas of science, including neurobiology, psychology, developmental biology, anthropology, evolutionary biology, genetics, and other fields, have all come together to try and solve the puzzle behind human handedness. Yet, there is not a single model that is sufficient to provide an universally accepted explanation. Interestingly enough, human handedness has been reported to exist since the Upper Palaeolithic, for more than 10,000 years; however, the proportion of left-handers in…