Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. “The meeting of ...

Rather than being a recent cultural development, kissing may have been practised by other early humans like Neanderthals and our ape ancestors ...

The first kiss with someone new is an event filled with mystery and anticipation. Whether it's your first kiss or your 10,000th, the experience always brings a mix of emotions and thoughts. You wonder ...