First kiss dates back 21 million years, say scientists 19 November 2025 Share Save Victoria Gill Science correspondent, BBC News Share Save Getty The researchers found evidence of kissing in …...
By BBC on December 04, 2025Getty The scientists defined a kiss as mouth-on-mouth contact "with some movement of lips or mouthparts and no food transfer" By finding evidence of other animals engaging in kissing, scientists were able to construct an "evolutionary family tree" to work out when it was most likely to have evolved.
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