Andreas Voss, left, and his son Timothy Voss, of The Netherlands, receive the Ig Nobel award in economics for testing which country's paper money is best at transmitting dangerous bacteria, at the 29th annual Ig Nobel awards ceremony at Harvard University, Thursday, Sept. 12, 2019, in Cambridge, Mass. The spoof prizes for weird and sometimes head-scratching scientific achievement are bestowed by the Annals of Improbable Research magazine, and handed out by real Nobel laureates. (AP Photo/Elise Amendola)
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