The Evolution of Kissing: A 21 Million Year Journey

Scientists have made a fun discovery about kissing. They found that animals like monkeys and bears kiss too!

The study shows that kissing started about 21 million years ago. That's a very long time ago!

Researchers looked at many animals to learn about kissing. They found that humans, chimps, and other apes all like to kiss. This means our old animal grandparents probably kissed too.

Even Neanderthals, who lived long ago, may have kissed. Scientists are still trying to understand why animals and people kiss.