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 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.