After players complained about the Jabulani ball used at the 2010 South Africa World Cup, Adidas went back to the drawing board. Physicist John Eric Goff explains how they built a better soccer ball.
John Eric Goff
George Washington encouraged sport and exercise among his soldiers during the American Revolution. A young Frenchman visiting his camp noted that Washington “sometimes throws and catches a ball for whole hours with his aides-de-camp.”