To explore caves on Mars and the Moon, take a hint from Hansel & Gretel, say boffins

Robot adventurers drop mesh network 'breadcrumbs' to keep connected To explore the subterranean lava tubes and caverns of the Moon or Mars we ought to consider the lessons learned by Hansel and Gretel, boffins have suggested, albeit with mesh networking technology the pair of unfortunate children didn't have.…