SOMETIMES a water droplet is not like water at all. It’s more like a solid
ball. Two French physicists have created water droplets that aren’t wet. Dubbed
“liquid marbles”, they don’t stick to surfaces and will even float on water
without breaking up.
Water droplets roll off a duck’s back because the feathers are coated with a
waxy layer that repels water. Pascale Aussillous and David Quéré
of the Collège de France in Paris wanted to create the same effect on any
surface. To do this they made water that wouldn’t stick to the surface.
They rolled droplets…
