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Ion-exchange bead writes under water – Physics World

Writing into Water? Scientists Discover a Way to Do it Using Pen and Ink

Scientists have found a way to write directly into water, one that does not require a surface to do it on.

Scientists figured out how to write in water

German physicists used an ion-exchange microbead as a very tiny "pen."

Physicists Have Figured Out a Way to Write in Water

There are several perfectly good reasons why water isn't a popular medium for calligraphers to write in.

Skewering cells, ant wars, writing in water, and more

Science you might have overlooked last week, because it was so tiny: micro-spikes skewer superbugs, writing in water, ant wars, and a tiny robot that can squish itself into tight spaces.