A lightweight liquid metal alloy that is less dense than water could be used to make exoskeletons and transformable flexible robots
Source:
https://www.newscientist.com/article/2236129-liquid-metal-that-floats-on-water-could-make-transformable-robots/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home