Mars space rover Curiosity to take first test drive

Curiosity rover

Nasa's space rover, Curiosity, will take its first test drive on the surface of Mars on Wednesday.

Scientists will try and make the robot travel three metres (10ft) before returning it to the spot where it first landed.

Why are scientists so interested in Mars?

It's expected that it will take 30 minutes to make the short journey.

It's not all been good news for the rover so far. It lost one of its two wind sensors when it touched down on the Red Planet earlier this month.

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