What causes some people to be left-handed, and why are fewer people left- handed than right-handed?

What causes some people to be left-handed, and why are fewer people left-handed than right-handed?

Rates of Left-Handedness: Downs and Ups

Why do left handers write so awkwardly with the hand curled over

Do all schools have a separate room for left-handed students? - Quora

Left, right, or ambidextrous: What determines handedness?

Do left-handed people really die young? - BBC News

What are proven facts about left-handed people? - Quora

Do left-handed people really die young? - BBC News

Why do left-handed people think they are special? - Quora

What causes some people to be left-handed, and why are fewer people left-handed than right-handed? - Deepstash

What is the connection between the brain and Left handedness? - Quora