CNN — While robotic rovers may explore the surface of Mars on behalf of humans who can't safely land there yet, they aren't alone. A fleet of orbiters circling the planet act as dual-purpose ...

Wind speeds on Mars are high enough to blow fleets of large spherical rovers that resemble tumbleweed across the Red Planet's surface, according to new wind-tunnel tests of small prototypes conducted ...

NASA is racing to understand why one of its most seasoned Mars orbiters suddenly fell silent, cutting off a critical scientific and communications lifeline around the Red Planet. The Mars Atmosphere ...