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Nasa’s planned mission to retrieve rocks from Mars is in trouble – but it’s a vital step to sending humans to the red planet

By Yang Gao, Professor of Robotics, Head of Centre for Robotics Research, King's College London

Nasa recently asked the scientific community to help come up with innovative ideas for ways to carry out its Mars Sample Return (MSR) mission. This was in response to a report by an independent board that deemed that its US$11 billion (£8.7 billion)…

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