Fritz Strack of Germany accepts the 2019 Ig Nobel Prize in Psychology for the study "Inhibiting and facilitating conditions of the human smile: a nonintrusive tester the facial feedback hypothesis" at the 29th First Annual Ig Nobel Prize ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 12, 2019. REUTERS/Brian Snyder 

1993 Nobel Laureate in Medicine Rich Roberts speaks at the 29th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 12, 2019. REUTERS/Brian Snyder 

1990 Nobel Laureate in Physics Jerome Friedman raises a toast at the 29th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 12, 2019. REUTERS/Brian Snyder 

Andreas Voss (L) and Timothy Voss of the Netherlands accept the 2019 Ig Nobel Prize in Economics at the 29th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 12, 2019. REUTERS/Brian Snyder 

Timothy Voss of the Netherlands holds the 2019 Ig Nobel Prize in Economics at the 29th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 12, 2019. REUTERS/Brian Snyder 

Barbara Allen Hill bites her hair during the mini-opera "Creatures of Habit" at the 29th First Annual Ig Nobel Prize ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 12, 2019. REUTERS/Brian Snyder 

Audience members throw paper airplanes at the stage during the 29th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 12, 2019. REUTERS/Brian Snyder 

1990 Nobel Laureate in Physics Jerome Friedman (R) plays the role of "Visting Scholar" during the mini-opera "Creatures of Habit" at the 29th First Annual Ig Nobel Prize ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 12, 2019. REUTERS/Brian Snyder 

Patricia Yang accepts the 2019 Ig Nobel Prize in Physics for the study "How Do Wombats Make Cubed Poo?" at the 29th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 12, 2019. REUTERS/Brian Snyder 

Audience members throw paper airplanes at the stage during the 29th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 12, 2019. REUTERS/Brian Snyder 

Master of Ceremonies Marc Abrahams, editor of the "Annals of Improbable Research," holds up the 2019 Ig Nobel Award at the 29th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 12, 2019. REUTERS/Brian Snyder 

Shiguru Watanabe of Japan is interrupted by Miss Sweetie Poo Emily Yue-Lin Chen (R) as he accepts the Ig Nobel Prize in Chemistry for the study "Estimation of the Total Saliva Produced Per Day in Five-Year-Old Children" at the 29th First Annual Ig Nobel Prize ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 12, 2019. REUTERS/Brian Snyder 

Shiguru Watanabe of Japan accepts the Ig Nobel Prize in Chemistry for the study "Estimation of the Total Saliva Produced Per Day in Five-Year-Old Children" at the 29th First Annual Ig Nobel Prize ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 12, 2019. REUTERS/Brian Snyder 

Shiguru Watanabe of Japan accepts the Ig Nobel Prize in Chemistry from 1993 Nobel Laureate Richard Roberts (R) for the study "Estimation of the Total Saliva Produced Per Day in Five-Year-Old Children" at the 29th First Annual Ig Nobel Prize ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 12, 2019. REUTERS/Brian Snyder 

Shiguru Watanabe of Japan accepts the Ig Nobel Prize in Chemistry for the study "Estimation of the Total Saliva Produced Per Day in Five-Year-Old Children" at the 29th First Annual Ig Nobel Prize ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 12, 2019. REUTERS/Brian Snyder 

Silvano Gallus of Italy accepts the Ig Nobel Prize in Medicine for the study "Does Pizza Protect Against Cancer?" at the 29th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 12, 2019. REUTERS/Brian Snyder 

Akira Horiuchi (R) of Japan demonstrates the research that led to the Ig Nobel for Medical Education for his medical report "Colonoscopy in the Sitting Position: Lessons learned from Self-Colonoscopy" during the 28th First Annual Ig Nobel awards ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 13, 2018. REUTERS/Brian Snyder TPX IMAGES OF THE DAY 

Nobel Laureates (L-R) Eric Maskin (2007 Economics), Wolfgang Ketterle (2011 Physics) and Michael Rosbash (2017 Medicine) participate in the 28th First Annual Ig Nobel Awards ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 13, 2018. REUTERS/Brian Snyder 

Nobel Laureates (L-R) Eric Maskin (2007 Economics), Wolfgang Ketterle (2011 Physics) and Michael Rosbash (2017 Medicine) participate in the 28th First Annual Ig Nobel Awards ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 13, 2018. REUTERS/Brian Snyder 

A teddy bear is released in memory of the late 1998 Ig Nobel Award winner Troy Hurtubise during the 28th First Annual Ig Nobel awards ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 13, 2018. REUTERS/Brian Snyder 

David Wartinger is interrupted by "Miss Sweetie Poo" Dorothea Hartig (R) while accepting the Ig Nobel prize for Medicine for "using roller coaster rides to try to hasten the passage of kidney stones" during the 28th First Annual Ig Nobel awards ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 13, 2018. REUTERS/Brian Snyder 

Master of Ceremonies Marc Abrahams takes the stage at the 28th First Annual Ig Nobel Awards ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 13, 2018. REUTERS/Brian Snyder 

The Boston Squeezebox Ensemble welcomes the audience to the 28th First Annual Ig Nobel awards ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 13, 2018. REUTERS/Brian Snyder 

Master of Ceremonies Marc Abrahams holds up an Ig Nobel prize at the 28th First Annual Ig Nobel Awards ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 13, 2018. REUTERS/Brian Snyder 

Researchers accept the Ig Nobel prize for Biology for "demonstrating that wine experts can reliably identify, by smell, the presence of a single fly in a glass of wine" during the 28th First Annual Ig Nobel awards ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 13, 2018. REUTERS/Brian Snyder 

Akira Horiuchi (R) of Japan demonstrates the research that led to the Ig Nobel for Medical Education for his medical report "Colonoscopy in the Sitting Position: Lessons learned from Self-Colonoscopy" during the 28th First Annual Ig Nobel awards ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 13, 2018. REUTERS/Brian Snyder 

Akira Horiuchi (R) of Japan demonstrates the research that led to the Ig Nobel for Medical Education for his medical report "Colonoscopy in the Sitting Position: Lessons learned from Self-Colonoscopy" during the 28th First Annual Ig Nobel awards ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 13, 2018. REUTERS/Brian Snyder 

Akira Horiuchi of Japan accepts the Ig Nobel for Medical Education for his medical report "Colonoscopy in the Sitting Position: Lessons learned from Self-Colonoscopy" during the 28th First Annual Ig Nobel awards ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 13, 2018. REUTERS/Brian Snyder 

Akira Horiuchi of Japan accepts the Ig Nobel for Medical Education for his medical report "Colonoscopy in the Sitting Position: Lessons learned from Self-Colonoscopy" during the 28th First Annual Ig Nobel awards ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 13, 2018. REUTERS/Brian Snyder 

Akira Horiuchi of Japan accepts the Ig Nobel for Medical Education for his medical report "Colonoscopy in the Sitting Position: Lessons learned from Self-Colonoscopy" during the 28th First Annual Ig Nobel awards ceremony at Harvard University in Cambridge, Massachusetts, U.S., September 13, 2018. REUTERS/Brian Snyder 

"Miss Sweetie Poo," played by Dorothea Hartig, right, demonstrates to Master of Ceremonies Marc Abrahams how she will let award recipients know that their speech is going too long, with her repeated phrase, "I'm bored" during the 27th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 14, 2017. REUTERS/Gretchen Ertl 

Soloist Ray Bauwens performs the final act of The Incompetance Opera as he is surrounded by Nobel laureates Eric Maskin, left, Oliver Hart, second from right, and Roy Glauber, right, during the 27th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 14, 2017. REUTERS/Gretchen Ertl 

Nobel laureate Roy Glauber holds a piece of cheese as human spotlight Madeline Pelz looks on during the presentation of the Ig Nobel prize in Medicine for the study, "The Neural Bases of Disgust for Cheese," during the 27th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 14, 2017. REUTERS/Gretchen Ertl 

Marc-Antoine Fardin accepts the Ig Nobel prize for Physics for his study, "Can a Cat Be Both a Solid and a Liquid," during the 27th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 14, 2017. REUTERS/Gretchen Ertl 

(L-R) Twins Aaron and Andrew Aguirre demonstrate the Ig Noble Cognition prize-winning study, "Is That Me or My Twin? Lack of Self-Face Recognition Advantage in Identical Twins," during the 27th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 14, 2017. REUTERS/Gretchen Ertl 

Performing chemist Michael Skuhersky participates in a Moment of Science during the 27th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 14, 2017. REUTERS/Gretchen Ertl 

Didgeridoo instructor Alex Suarez, center, demonstrates the Ig Nobel Peace prize-winning study, "Didgeridoo Playing as Alternative Treatment for Obstructive Sleep Apnoea Syndrome," during the 27th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 14, 2017. REUTERS/Gretchen Ertl 

Sally Buta, left, and Mike Scott, both of Arlington, Mass., throw paper airplanes during the 27th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 14, 2017. REUTERS/Gretchen Ertl 

Oliver Hart, 2016 Nobel laureate in Economics, center, participates in a demonstration for the Ig Noble Economic Prize titled, "Betting on Electronic Gaming Machines is Intensified by Reptile-Induced Arousal," during the 27th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 14, 2017. REUTERS/Gretchen Ertl 

Jiwon Han, a student at the University of Virginia, demonstrates what happens when a person walks backwards while carrying a cup of coffee after being awarded the Ig Noble Fluid Dynamics Prize for "A study on the Coffee Spilling Phenomena in Low Impulse Regime," during the 27th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 14, 2017. REUTERS/Gretchen Ertl 

Matteo Martini, Lecturer in Psychology at the University of East London, U.K., appears to receive the Ig Noble prize in Cognition for his group study titled, "Is That Me or My Twin? Lack of Self-Face Recognition Advantage in Identical Twins" during the 27th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 14, 2017. REUTERS/Gretchen Ertl 

Luis Pallares Aniorte, of Spain, accepts the Ig Nobel prize for Obstetrics, for his group study showing that a developing fetus responds more strongly to music that is played electromechanically inside the mother's vagina than to music played electromechanically on the mother's belly, during the 27th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 14, 2017. REUTERS/Gretchen Ertl 

Emily Holman, of Cambridge, Mass., hugs Jim Bredt, the human spotlight, after winning "The Empty Box" prize during the 27th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 14, 2017. REUTERS/Gretchen Ertl 

Eric Maskin, 2007 Nobel laureate in Economics, left, and Oliver Hart, 2016 Nobel laureate in Economics, try on plastic ears during the announcement that "Why Do Old Men Have Big Ears," won the Anatomy Prize during the 27th First Annual Ig Nobel Prize Ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 14, 2017. REUTERS/Gretchen Ertl 

Nobel Laureate 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 TPX IMAGES OF THE DAY

Nobel Laureates Rich Roberts (L) Dudley Herschbach (2nd L) and Eric Maskin play "Tick-Tock-Toe" against a roller derby team (R) during the 26th First Annual Ig Nobel Prize ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 22, 2016. REUTERS/Brian Snyder

Nobel Laureates Eric Maskin and Dudley Herschbach play "Tick-Tock-Toe" during the 26th First Annual Ig Nobel Prize ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 22, 2016. REUTERS/Brian Snyder

NASA scientists Lisa Danielson (L) and Will Stepanov are celebrated onstage for their wedding anniversary during the 26th First Annual Ig Nobel Prize ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 22, 2016, fifteen years after they were married during an Ig Nobel prize ceremony. REUTERS/Brian Snyder

NASA scientists Lisa Danielson (L) and Will Stepanov are celebrated onstage for their wedding anniversary during the 26th First Annual Ig Nobel Prize ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 22, 2016, fifteen years after they were married during an IgNobel prize ceremony. REUTERS/Brian Snyder

Nobel Laurette Dudley Herschbach (R) presents the 2016 IgNobel Prize in Physics to Susanne Akesson of Sweden for work "discovering why white-haired horses are the most horsefly-proof horses, and for discovering why dragonflies are fatally attracted to black tombstones" during the 26th First Annual Ig Nobel Prize ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 22, 2016. REUTERS/Brian Snyder

"Majordomo" Gary Dryfoos sits onstage before the 26th First Annual Ig Nobel Prize ceremony at Harvard University in Cambridge, Massachusetts, U.S. September 22, 2016. REUTERS/Brian Snyder

Thomas Thwaites of the United Kingdom accepts the 2016 Ig Nobel Prize in Biology for "creating prosthetic extensions 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

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

Nobel Laurette Roy Glauber (R) congratulates Atsugi Higashiyama of Japan for winning 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

Human spotlight Katrina Rosenberg lights 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