Asymmetrical behavior patterns of humans spread to the foot, eye, and ear as well.
It’s proven that the gene LRRTM1 plays a significant role in handedness.
The left handed people have better and faster connections between the left and right side of the brain which means they’re better at dealing with multiple stimuli.
People who are left handed tend to draw figures that face to the right.
Scientists believe that the proportion of left handers in the human population has always been about 10%.