
Mars cave-exploring robots take inspiration from Hansel and Gretel's breadcrumb trick
The rovers could use communication "breadcrumbs" to keep in touch with the surface as they explore caves, oceans, and lakes on alien worlds.
Mars, the Red Planet, is the fourth planet from the sun.
Related Topics: Curiosity Mars Rover Mission, ExoMars, India Mars Orbiter Mission, Mars Rover Opportunity, Maven Mars Mission