>Perhaps no people on earth remain more genuinely isolated than the Sentinelese, one of the few un-contacted people in the world, who have lived in the North Sentinel Islands of the Andamans for last estimated 60,000 years shunning any contact with the outside world.
I took this to mean they've been isolated at least in terms of not having genes cross over.
I took this to mean they've been isolated at least in terms of not having genes cross over.