There's one country that constantly produces the tallest people in the world - so what's their secret?
Like the rest of the Europe and in western nations, heights in the Netherlands have increased dramatically over the past 200 years but for some reason the Dutch just grow higher.
Genetics play a part but researchers say there is a clear link between living environments and healthier, taller populations.
Emile Donovan is joined by Kristina Thompson, an associate professor of health and society at Wageningen University.