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The story of the first kiss—21.5 million years ago

Why the simple act of kissing—which can be traced back 21.5 million years—continues to confound evolutionary biologists

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Feb 13, 2026 - 18:00
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The story of the first kiss—21.5 million years ago

Why the simple act of kissing—which can be traced back 21.5 million years—continues to confound evolutionary biologists

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