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Home In a clean room at NASA’s Jet Propulsion Laboratory in Southern California, engineers observed the first driving test for NASA’s Mars 2020 Perseverance rover on Dec. 17, 2019. (NASA/JPL-Caltech) In a clean room at NASA's Jet Propulsion Laboratory in Southern California, engineers observed the first driving test for NASA's Mars 2020 Perseverance rover on Dec. 17, 2019. (NASA/JPL-Caltech)

In a clean room at NASA’s Jet Propulsion Laboratory in Southern California, engineers observed the first driving test for NASA’s Mars 2020 Perseverance rover on Dec. 17, 2019. (NASA/JPL-Caltech)

In a clean room at NASA's Jet Propulsion Laboratory in Southern California, engineers observed the first driving test for NASA's Mars 2020 Perseverance rover on Dec. 17, 2019. (NASA/JPL-Caltech)

In a clean room at NASA’s Jet Propulsion Laboratory in Southern California, engineers observed the first driving test for NASA’s Mars 2020 Perseverance rover on Dec. 17, 2019. (NASA/JPL-Caltech)

This illustration shows NASA’s Mars 2020 spacecraft carrying the Perseverance rover as it approaches Mars. (NASA/JPL-Catech)