Did you know that the marshmallow is actually a plant and that, beginning around 9th century BCE, the Greeks used them to heal wounds and soothe sore throats? This is the long, sweet history of marshmallows. 

Long before Siri and Amazon’s Echo, there was a sarcastic robot that quizzed users with multiple choice questions stored on 8-track cassettes. We remember the first-ever smart toy called 2-XL. 

Dog walking isn’t always a walk in the park, so to speak—just ask the professionals hired to maneuver multiple dogs at once (and, occasionally, spot early signs of ill health). mental_floss shares 13 behind-the-scenes secrets of dog walkers. 

Today’s Big Question: Why do we call general knowledge “trivia”? 

The behind-the-scenes story of the 1993 blockbuster The Fugitive is just as complicated and twisty as its plot. 

There’s a reason you’re so addicted to the taste of cold seltzer: According to a new study, it quenches your thirst best. 

In her latest book, People Knitting: A Century of Photographs, Barbara Levine collects more than 100  images of people from around the world knitting. Here are 10 of our favorites. 

This week, with the launching of Green's Dictionary of Slang Online, it's become a whole lot easier to dig into the fascinating, long history of English slang.