Scientists discovered that water droplets don’t just passively roll around on a hot skillet. Many cooks have experienced this -- sprinkle a few drops of water on a searing hot skillet, and watch them roll around like a couple of glass beads. Scientists had previously thought that this phenomenon is solely due to the cushions of steam that form underneath the droplets, but now researchers find these drops also propel themselves, with the churning fluid inside them acting like engines. This discovery could lead to new kinds of self-propelled devices, they add . READ FULL ARTICLE.

Image credits: Ambre Bouillant, Célia Boutilier and David Quéré