Smithsonian Magazine on MSN

How Did Humans End Up Smooching on the Lips? It May Have Started Out With a 21-Million-Year-Old Kiss

Kissing, for all popularity, is a bit of a mystery. Scientists have long debated when humans’ ancestors first put their lips together, and whether the act is simply a cultural trait. A new study ...
HealthDay on MSN

Scientists Say Kissing Began Long Before Humans Existed

Key Takeaways Kissing may date back 21.5 million years in early ape ancestorsResearchers studied modern primates to estimate ...