![]() Komlos, currently a visiting professor of economics at Duke University. height has stagnated, according to a study by John M. Interestingly, Americans were the tallest people in the world by World War II, measuring 5.8 feet (1.77 meters), but by the end of the 20th century, they fell behind, and the average U.S. In a number of other developed countries, people have been growing taller, too, reaching the world's current greatest average height of 6 foot 1 inch (1.85 meters) in the Netherlands. The increase can be attributed, most likely, to improved nutrition, health services and hygiene, said the researchers from the University of Essex in Colchester. In the study of British recruits, the average height of British men, who had an average age of 20, was about 5 feet 6 inches (168 centimeters) at the turn of the century, whereas now they stand on average at about 5 feet 10 inches (178 cm). Here's a look at some of the major changes to humans that have occurred in the past century or so.Ī recent British study, published by the Institute for the Study of Labor (IZA) in Bonn, Germany, showed that young men in the United Kingdom have grown by 4 inches (10 centimeters) since the turn of the 20th century. "When you look at what happens when the Taliban denies the polio vaccination in Pakistan, that is actually exerting a selection pressure that is different in Pakistan than we have in New York City," he said. ![]() "A big take-home point of all current studies of human evolution is that culture, particularly in the form of medicine, but also in the form of urbanization and technological support, clean air and clean water, is changing selection pressures on humans," Stearns told Live Science. ![]() And though it may seem that natural selection does not affect humans the way it did thousands of years ago, such evolutionary mechanisms still play a role in shaping humans as a species, Stearns said. ![]()
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