Ion-exchange bead writes under water – Physics World physicsworld.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from physicsworld.com Daily Mail and Mail on Sunday newspapers.
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.