Why 90% of people are right-handed: Scientists trace answer back millions of years
New research suggests that upright walking and brain development shaped humans’ right-handedness. This evolutionary process begins when the hands are freed from the task of movement. As hominins evolved, right-handedness became stronger as brain size increased. Larger brains promote specialization of the cerebral hemispheres, making consistent hand use more common. This explains why most people … Read more
