The mechanical Silver Swan dating from 1774 that have three separate clock work mechanisms by John-Joseph Merlin a Belgian clock maker, during a press preview for the Robots exhibition held at the Science Museum in London, Tuesday, February 7, 2017. The exhibition which shows 500 years of mechanical and robotic advances is open to the public form Feb. 8 through to Sept. 3. (Photo by Alastair Grant/AP Photo)
