A team of scientists including Mengmeng Sun of the Chinesese University of Hong Kong have created a "magnetic slime robot" that can stretch and squeeze "into tight spaces", far beyond what is possible with a traditionally-framed robotic chassis. It can act as a liquid or a solid, and even fold in on itself. The given example is recovering batteries swallowed by children. It looks like a glistening, sentient turd.
Scientists have created a magnetic slime that is capable of squeezing through narrow spaces, encircling smaller objects and healing itself. The slime can be controlled by magnets and can act as both a solid and a liquid.