TINY robotic crabs - no bigger than the size of a flea may be used in the future to clear blocked arteries and attack tumors, experts say.
Engineers at Northwestern University in Illinois developed the minuscule remote-controlled devices, which are shaped to resemble a crab with eight legs and pincers.
The technological wonders are so small they can stand on the edge of a coin, but scientists say they can be directed to bend, twist, crawl, walk, turn and jump.
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