According to military records, the average height of a male in the Netherlands has gained 20 cm (eight inches) in the last 150 years. On average, Dutch women stand almost 1.71 metres (5.6 feet) tall, and its men 1.84 metres.
The Dutch are, on average, the world’s tallest people, but it hasn’t always been that way.
So what happened? Scientists believe a number of factors are responsible, such as genetics, better diet and medical care.
But now there’s another theory. Research from the London School of Tropical Medicine suggests that natural selection may also have something to do with it.
Jane O’Brien went to the Netherlands to find out more.