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

Kisses, storytellers believe, are transformative. A kiss on the lips can transform a frog into a prince or rescue a sleeping beauty from a coma spell. Symbolically, kisses are a pivotal point in a ...

Our lips say a lot, from words to kisses, whether the embraces of new lovers, friends greeting one another, or parents saying goodnight to kids. No matter what kind of kiss, passionate or tender, they ...

Sophie Lund Rasmussen has received funding from the Edubba Foundation and the Carlsberg Foundation. Troels Pank Arbøll has received funding from the Edubba Foundation and the Carlsberg Foundation. Lip ...