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Engineers at the University of Arizona have developed a system they say could allow autonomous vehicles to scout out habitats for astronauts in caves and other underground features by leaving a trail of 'breadcrumbs.'
"...Hansel and Gretel dropped breadcrumbs to make sure they'd find their way back. In our scenario, the 'breadcrumbs' are miniaturized sensors..."
Future space missions likely will send robots to scout out underground habitats for astronauts. UArizona engineers have developed a system that would allow autonomous vehicles to explore caves, lava tubes and even oceans on other worlds.