We weren’t supposed to have chins

Humans are the only species that has chins. How this unique trait evolved has always been somewhat of a mystery. In this episode of Science Quickly, host Kendra Pierre-Louis talks to paleoanthropologist Lauren Schroeder, who co-authored a recent study that sheds light on the evolutionary riddle of the chin and the ways that evolution can sometimes occur unexpectedly. Recommended Reading: “Is the Human Chin a Spandrel? Insights from an Evolutionary Analysis of Ape Craniomandibular Form,” by Noreen von Cramon-Taubadel et al, in PLOS One, Vol. 21, No. 1; January 29, 2026 E-mail us at [e-mail] if you have any questions, comments or ideas for stories we should cover! Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter. Science Quickly is produced by Kendra Pierre-Louis, Fonda Mwangi, Sushmita Pathak and Jeff DelViscio. This episode was edited by Alex Sugiura, with fact-checking by Shayna Posses and Aaron Shattuck. Our theme music was composed by Dominic Smith. Learn more about your ad choices. Visit megaphone.fm/adchoices