The 2018 Ig Nobel prizes are out. It’s hard to pick favorites this time, but here are some of the winners:

ANTHROPOLOGY PRIZE [SWEDEN, ROMANIA, DENMARK, THE NETHERLANDS, GERMANY, UK, INDONESIA, ITALY] — Tomas Persson, Gabriela-Alina Sauciuc, and Elainie Madsen, for collecting evidence, in a zoo, that chimpanzees imitate humans about as often, and about as well, as humans imitate chimpanzees.

CHEMISTRY PRIZE [PORTUGAL] — Paula Romão, Adília Alarcão and the late César Viana, for measuring the degree to which human saliva is a good cleaning agent for dirty surfaces.

NUTRITION PRIZE [ZIMBABWE, TANZANIA, UK] — James Cole, for calculating that the caloric intake from a human-cannibalism diet is significantly lower than the caloric intake from most other traditional meat diets.