Americans will be taller by from one to two inches.



John Elfreth Watkins : engineer
The average American man in 1900 was about 66-67ins (1.68-1.70m) tall and by 2000, the average was 69ins (1.75m). Today, it's 69.5ins (1.76m) for men and 64ins (1.63m) for women.


Tom Geoghegan. "Ten 100-year predictions that came true", BBC News Magazine. 11 Jan 2012. http://www.bbc.co.uk/news/magazine-16444966


http://www.bbc.co.uk/news/magazine-16444966