Are 19% of the redheads living in Scotland?Someone made up the fact that 19% of the world's redheaded population lives in Scotland and it showed up in a BBC News report. It turns out that only 1% of the world's redheaded population live in Scotland. There is an evolutionary advantage to having light skin/red hair for people living outside of the tropics; pale skin is much more efficient at using limited amounts of sunlight to produce vitamin D.
Also, Left-handed people do not die 9 years later. Also surprisingly, left-handed are on average younger than right-handed people.