The 'Microrockets' could explore strange new worlds in your stomach

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Perhaps a certain magical school bus could have gotten a boost from this new invention while visiting the human digestive system. Researchers have created "microrockets" powered by bubbles of hydrogen present in strong acids such as stomach acid. Each rocket is about 10 nanometers long, about a thousandth as wide as a human hair. Someday such a motor could measure pH in extreme environments or deliver drugs to specific places in the human body, the researchers wrote in their paper, published Jan. 18 in the Journal of the American Chemical Society.   more...