Resumen de Tiny robots swim the front crawl in blood
The front crawl is the fastest way for humans to swim. So Tianlong Li at the Harbin Institute of Technology in China and his colleagues built their swimming robot to mimic that motion. Each bot is 5 micrometers long and has three main parts linked by two silver hinges. Its gold body is flanked by two magnetic arms made of nickel. Alternating the direction of a magnetic field around the bot causes its arms to rotate and propels the nano-swimmer forward.
