Kissing goes back 21 million years, to the common ancestor of humans and other large apes, study finds - Live Science

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1. Kissing goes back 21 million years, to the common ancestor of humans and other large apes, study finds  Live Science
2. Kissing is an ‘evolutionary conundrum.’ Scientists just mapped its unexpected origins  CNN
3. 21-million-year-old smooch: The very first kiss occurred before humans, study says  ABC News
4. Neanderthals also kissed: A gesture of love that is 21 million years old  EL PAÍS English
5. Kissing Has Existed for at Least 16 Million Years, Scientists Say  The New York Times

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