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1 (of 3) The three chemistry laureates Dudley Herschbach, Yuan T. Lee and John Polanyi, 1986.

Photo: Boo Jonsson. Nobel Foundation Archive.

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2 (of 3) John Polanyi at Nobel Week Dialogue, 9 December 2019.

© Nobel Media. Photo: Anna Svanberg.

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3 (of 3) Nobel Prize laureates Steven Chu, John Polanyi and Tawakkol Karman in a discussion at Nobel Week Dialogue, 9 December 2019.

© Nobel Media. Photo: Henrik Jansson