Soft robots may soon be more flexible than ever... and a tad creepy. As The Guardian reports, researchers have developed a magnetic slime "robot" that can shift into different shapes to grab objects. It can encircle a group of pellets, for instance, and even stretch out in multiple directions to grab items on opposite sides. It's self-healing, too. The result might induce some nightmares for the squeamish and is more than a little reminiscent of Spider-Man's symbiotic Venom, but it's surprisingly effective.

A robot made of magnetic slime could be deployed inside the body to perform tasks such as retrieving objects swallowed by accident.https://t.co/EYpnx56vNO pic.twitter.com/zA3hMO80xQ

The slime is made from the blend of polyvinyl alcohol (a polymer), borax and neodymium magnet particles. The result is a non-Newtonian fluid that behaves like a liquid or solid depending on force, and can be controlled using external magnets. There are no robotics inside the slime at present, but you can steer it like a robot— and the "ultimate goal" is to use it like one, according to researcher and co-creator Li Zhang.

There are numerous problems left to solve. On top of fitting robotics into such a soft design, the scientists also want to prevent the toxic neodymium particles from seeping out. A layer of silica in this current slime helps, but safety inside a living being might depend on limiting contact. If the technology becomes sufficiently safe and effective, though, it could help doctors recover swallowed objects and otherwise squeeze robots into places where they were previously impractical.

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