It's seventy years to the day since No. 617 Squadron of the Royal Air Force returned from Operation Chastise, in which specially designed bouncing bombs were dropped in an attack on the Möhne, Sorpe and Eder Dams in Germany during World War II. Though the bouncing bomb is without doubt the invention for which Barnes Wallis is most renowned (thanks in no small part to its depiction in the film Dambusters
) Wallis' other work before, during, and after World War II was of great importance, and in some cases, far ahead of its time. Gizmag spoke to Dr. Andrew Nahum, Principal Curator of Technology at the Science Museum where many of Wallis' papers are archived, about swing-wing aircraft, earthquake bombs, improbable mathematics lessons, and the geodetic Wellington Bomber.