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Follow along as NASA launches the Mars 2020 Mission, perhaps the most ambitious hunt ever for signs of life on Mars. For the first time, in February 2021, a rover will attempt a risky landing in Jezero Crater, the coveted site of an ancient river delta that could possibly be a cradle of life. Narrator: Terri Randall. Producer: Laurie Cahalane, Melanie Wallace, Terri Randall.