- Kissing Has Existed for at Least 16 Million Years, Scientists Say The New York Times
- 21-million-year-old smooch: The very first kiss occurred before humans, study says ABC News
- Neanderthals also kissed: A gesture of love that is 21 million years old EL PAÍS English
- When was the first kiss? Over 17 million years ago, a study suggests. The Washington Post
- First kiss dates back 21 million years, say scientists BBC
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