Who Won the U.S. Presidential Debate?

Many of us are familiar with the story of The Frog Prince, where a princess kisses a frog, and to her surprise, it transforms into a human prince.

In reality, many frog species produce poison in their skin, the effects of which can range from mild nausea to death, so this display of affection is generally ill-advised. But what if the frog had found a more unusual way to defend itself, one that left our heroine's lips sealed by the kiss instead?

Biological adhesives: A tale as old as slime

While humans mainly use synthetic materials to make things sticky, our princely frog—like other glue-producing organisms—produces what is known as a "biological adhesive." These naturally secreted materials are widespread among animals, and are often essential for their survival.

For example, mussels and barnacles produce a type of glue that permanently cements them to the underwater surfaces they call home, while other ocean-dwelling animals, such as starfish, use a different, much more temporary kind of glue to help them move around.

• Read More