Brits, Irish, Scots: New Genetic Studies Suggest They're All One

[mrbeast]

Possible explanation for the lack of genetic diversity in Humanity:

http://en.wikipedia.org/wiki/Toba_catastrophe_theory

According to the Toba catastrophe theory, 70,000 to 75,000 years ago a supervolcanic event at Lake Toba, on Sumatra, reduced the world's human population to 10,000 or even a mere 1,000 breeding pairs, creating a bottleneck in human evolution