As it turns out, few people are 100% left-handed or right-handed. Handedness exists on a continuum. But new research finds a surprisingly striking difference between the percentage of lefties and righties who are 100% handed. Here’s what we learned. https://www.psychologytoday.com/us/blog/the-asymmetric-brain/202609/how-rare-is-it-for-someone-to-be-100-percent-left-handed