After months stuck fast in deep Martian sand, NASA's embattled rover Spirit is facing a debilitating wheel problem that has slowed its escape efforts and could paralyze the long-lived robot. Spirit ...

The solar panel technology we have available today doesn’t really lend itself to practical everyday transport. But when speed isn’t a concern, it can make for some very interesting autonomous rovers.

Next year, the NASA rovers Perseverance and Curiosity and the Chinese rover Zhurong will be joined by another Martian explorer: The European Space Agency (ESA) and Roscosmos’s ExoMars rover, named ...