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This illustration shows a concept of what a rover fetching rock and soil samples on Mars for return to Earth could look like. The sample tube in this image would have been left on the surface by a previous mission, NASA's Mars 2020 rover. NASA and the European Space Agency (ESA) are solidifying concepts for a Mars sample return mission to return Mars 2020 samples to Earth for scientific investigation. NASA will deliver a Mars lander in the vicinity of Jezero Crater, where the Mars 2020 rover will have collected and cached samples. The lander will carry a NASA rocket (the Mars Ascent …