A Pioneering Study Analyzes when Humans Began Kissing: They Set the Origin 21 Million Years Ago

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The act of kissing may seem like an almost automatic gesture for many of us today, but it has something disconcerting from the evolutionary point of view: it involves direct contact, saliva exchange and risk of contagion. Still, it appears again and again in different cultures and historical moments. A new study led by researchers from the University of Oxford has set out to answer a basic question: where does this behavior come from? To do so, …

Deník N

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Chimpanzees, bears, and even albatrosses kiss. On the other hand, some human cultures have not yet adopted this behavior. Scientists are now trying to find out why this is so - and what role evolution plays in it.