Reference: 1870 Title: Splitting the Atom: Cockcroft and Walton’s Milestone in 1932 Summary: On April 14, 1932, John Cockcroft and Ernest Walton achieved the first controlled artificial nuclear transmutation, confirming mass-energy equivalence. URL: https://www.wired.com/2008/04/april-14-1932-zounds-weve-split-the-atomic-nucleus