diet
Sudanese people are the tallest on earth
It's actually because of gravity. Africa has much denser gravity than most areas on the planet, because of that Africans are generally shorter than most people
The countries that made up what was Yugoslavia,are every bit as tall as the Dutch, the Danes are also sitting around a 6ft average for males.most of the world is like 5'8" on average only the dutch are actually tall most of the irish I have met have actually been pretty short too Conor O'Connor is only 5'9"