Science Daily  June 15, 2023 Navigation in indoor and underground environments has been extensively studied to realize automation of home, hospital, office, factory and mining services, and various techniques have been proposed for its implementation. An international team of researchers (Japan, UK, Italy) developed a completely new wireless navigation technique called wireless muometric navigation system (MuWNS) utilizing the relativistic and penetrative nature of cosmic-ray muons. They demonstrated MuWNS by using the system on the basement floor inside a building to navigate (a person) in an area where global navigation satellite system (GNSS)/ global positioning system (GPS) signals could not reach. […]