Étienne-Jules Marey (French: [etjɛn ʒyl maʁɛ]; 5 March 1830, Beaune, Côte-d'Or – 15 May 1904, Paris) was a French scientist, physiologist, and chronophotographer.
His work was significant in the development of cardiology, physical instrumentation, aviation, cinematography, and the science of laboratory photography. He is widely considered to be a pioneer of photography and an influential pioneer of the history of cinema. He was also a pioneer in establishing a variety of graphical techniques for the display and interpretation of quantitative data from physiological measurement.
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