High in the icy Indian Himalayas, the long-isolated Brokpa people recall origin myths of millennia-old migrations from afar -- an identity in disputed lands twisted today by politics. Brokpa people recount myths of ancestral links to Alexander the Great's army, who invaded in the fourth century BC, and also ancient Rome. But scientists are sceptical, with one study of Brokpa DNA suggesting their roots lay in southern India. IMAGES AND SOUNDBITES