The prolific Edison invented the phonograph, popularised electric light, and (among much else) founded the world’s first industrial research lab. Acheson, Dickson, Hammer and Tesla all worked with or under him, though he never appreciated Tesla’s genius. Marey’s meeting with him helped inspire the kinetoscope, while Muybridge’s led to the first ever moving image with sound (Muybridge despairing at its crudeness). Eastman and Edison clashed over X-rays but successfully collaborated on photographic and movie technology. Edison ignored his family and had few friends, though Eastman and Ford became close.