Swarms of robots could help map out underground networks and detect leaks as they float through pipes
Source:
https://www.newscientist.com/article/2224098-swarms-of-golf-ball-sized-robots-could-detect-leaks-in-the-sewers/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home