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Scientists reveal kissing began millions of years before humans
Kissing Has Existed for at Least 16 Million Years, Scientists Say
Kissing May Have Evolved 21.5 Million Years Ago in Ancestor of Great Apes and Humans
Kissing may have evolved in an ape ancestor 21 million years ago
Does Kissing Expose You to Gluten? Scientists Investigated The Risks
The Primal Origins of Kissing Were Just Revealed, And It's So Gross
