With Valentine’s Day around the corner, kissing may be on your mind. But why do we kiss? In this episode of Science Quickly, evolutionary biologist Matilda Brindle joins host Kendra Pierre-Louis to uncover the evolutionary roots of kissing. We trace kissing back 21.5 million years and learn how it’s common among primates and what that tells us about how kissing may have evolved among humans. Plus, we also unpack recent findings that hint that humans and Neandertals may have once locked lips.

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Kissing May Have Evolved 21.5 Million Years Ago

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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.

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