Scientists have identified the genes linked to left-handedness
https://edition-m.cnn.com/2019/09/05/health/uk-left-handed-genes-brain-structure-scn-scli-intl/index.html?r=https%3A%2F%2Fedition.cnn.com%2F
I guess that environment of lefties affects its higher talent. They have to
use brains to think about how to do, when they encounter systems designed for righties.
For example, most of the gates in subway stations have inserting points of the tickets on right side. Then, lefties realize that they have to use right hands to pass through the gates.
