search and rescue

Image: In this artist's impression of the breadcrumb scenario, autonomous rovers can be seen exploring a lava tube after being deployed by a mother rover remaining at the entrance to maintain contact with a blimp or blimp. Credit: John Fowler/WikiCommons, Mark Treble Wolfgang Fink/University of Arizona

Hansel and Gretel's breadcrumbs reach Mars

Engineers from the University of Arizona have developed a system that allows autonomous vehicles to scan underground habitats for astronauts