科技突破：一磁性粘液制成的机器人

 一个由磁性粘液制成的机器人可以部署在体内，以执行诸如取回意外吞下的物体等任务。
A robot made of magnetic slime could be deployed inside the body to perform tasks such as retrieving objects swallowed by accident.

Elastic robots capable of manipulating objects and fluid-based robots that can navigate tight spaces both already exist, but robots combining both properties are less common.

A robot made of magnetic slime with a custard-like consistency can navigate narrow passages, grasp objects and fix broken circuits. It could be deployed inside the body to perform tasks such as retrieving objects swallowed by accident.

Li Zhang at the Chinese University of Hong Kong and his colleagues mixed neodymium magnet particles with borax, a common household detergent, and polyvinyl alcohol, a kind of resin, to form a slime that can be controlled …