Shall we play a game - of Wiffle ball? Invented in 1953, this lightweight alternative to a baseball is perfectly suited for back yard romping. Today we explain why the design of the Wiffle ball guarantees that you don't need a strong arm to throw a variety of pitches. More about Jenn Stroud Rossman's work on Wiffle Balls here:https://www.theatlantic.com/technology/archive/2017/09/wiffle-ball-physics/539982/