Scientists in Polina Anikeeva's lab at MIT’s McGovern Institute have developed tiny, soft-bodied robots that can be controlled with a weak magnet. The robots, formed from rubbery magnetic spirals, can be programmed to walk, crawl, swim—all in response to a simple, easy-to-apply magnetic field. The above video shows cargo transport by a crawler under a unidirectional magnetic field. Video: Bioelectronics Group, MIT