Why Do We Kiss? Scientists Have a Surprising Answer
Kissing might seem like a very human thing to do. But guess what? It's not! Scientists think that kissing started way before humans even existed. They believe that our ancient ancestors were doing it over 20 million years ago. That's a long time ago! So, how did they figure this out? Well, they studied different types of primates like chimpanzees, bonobos, orangutan...