American sculptor Alexander Calder was a radical figure who pioneered kinetic sculpture, bringing movement to static objects. Calder travelled to Paris in the 1920s, having originally trained as an engineer, and by 1931 he had invented the mobile, a term coined by Duchamp to describe Calder’s sculptures which moved of their own accord.
Tate Modern 11 November 2015 – 3 April 2016 London