Water droplets become hydrobots by adding magnetic beads

Using a piece of magnet, researchers have designed a simple system that can control the movement of a small puddle of water, even when it's upside down. The new liquid manipulation strategy can have a wide range of applications including cleaning hard-to-reach environments or delivering small objects.

from Latest Science News -- ScienceDaily https://www.sciencedaily.com/releases/2021/06/210603111954.htm