The Week In Numbers: The Cost Of A DIY Spacesuit, The Calories In A Human Body, And More

Detail Of Small Arms Of WWI Collaborative Project Detail from the larger image. At the center is the Colt/Browning Model 1895 machine gun, used by the Dominion of Canada and the Kingdom of Belgium in World War I. C&Rsenal 113: the number of hand-held weapons used World War I and catalogued by this crowd-sourced project. The project is incomplete, so you can add arms if you know of them. 60 percent: reduction in levels of the air pollutant nitrogen dioxide in the U.S. since 1980. The U.S. Environ...