Audience members throw paper airplanes at the stage during the 26th First Annual Ig Nobel Prize ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 22, 2016. REUTERS/Brian Snyder

Atsugi Higashiyama of Japan accepts the 2016 Ig Nobel Prize in Perception for "investigating whether things look different when you bend over and view them between your legs" during the 26th First Annual Ig Nobel Prize ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 22, 2016. REUTERS/Brian Snyder

Nobel Laurette Eric Maskin (R) presents the 2016 Ig Nobel Prize in Biology to Thomas Thwaites of the United Kingdom for "creating prosthetic extension of his limbs that allowed him to move in the manner of, and spend time roaming the hills in the company of, goats" during the 26th First Annual Ig Nobel Prize ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 22, 2016. REUTERS/Brian Snyder

Fredrik Sjoberg of Sweden accepts the 2016 Ig Nobel Prize in Literature for "his three-volume autobiographical work about the pleasures of collecting flies that are dead, and flies that are not yet dead" during the 26th First Annual Ig Nobel Prize ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 22, 2016. REUTERS/Brian Snyder

U.S. National Guard soldiers are greeted by a preacher as they prepare for another night of protests over the police shooting of Keith Scott in Charlotte, North Carolina, U.S. September 22, 2016. REUTERS/Mike Blake

U.S. National Guard soldiers prepare for another night of protests over the police shooting of Keith Scott in Charlotte, North Carolina, U.S. September 22, 2016. REUTERS/Mike Blake

U.S. National Guard soldiers prepare for another night of protests over the police shooting of Keith Scott in Charlotte, North Carolina, U.S. September 22, 2016. REUTERS/Mike Blake

Canada's Prime Minister Justin Trudeau raises his glass for a toast during a dinner with Chinese Premier Li Keqiang (not pictured) at the Canadian Museum of History in Gatineau, Quebec, Canada, September 22, 2016. REUTERS/Chris Wattie