82nd & Fifth: MOTION by Marla Prather

06/20/2013 06:02 pm ET | Updated Aug 20, 2013

Calder developed the mobile, which is moved by a gentle touch of the hand or by air currents, at a time when other artists were interested in communicating the fast pace of modern life. "I think the mobiles help to slow us down," says curator Marla Prather.

See the graceful movement of his mobile with this 180° rotation.