Any water droplet can dance. Take, for instance, the water drops bouncing around in Yanlin Song’s lab. When a droplet touched the surface, the water that touched the sticky design rebounded much slower than the water that touched the rest of the water-resistant plate. Normally when a water droplet hits a plain surface, it immediately recoils straight up. Dr. Song and his team have constructed half-moons, pinwheels and one design that resembles a circle divided into three curved lines.

Source: New York Times March 26, 2019 06:22 UTC