After months of tests and analysis, engineers plan to send commands to the Spirit Mars rover Monday in an attempt to drive it out of powdery soil that has trapped the robot since April.

Rovers are one of the major workhorses of modern-day Mars exploration. Over the last two decades, these six-wheeled robotic emissaries have grown steadily in size and capability, providing ...

The first Mars Exploration Rover landed on the red planet in January 2004. Initially, the mission was supposed to last 90 Martian days, but Spirit exceeded that by over 20 times.

The ExoMars rover is set to visit Mars in 2018. Spirit might also have a rock beneath its belly, Elfving says, which could leave it almost hanging in the air, making any attempted manoeuvres risky.

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