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7 Things to Know About the Mars 2020 Perseverance Rover Mission
Countdown to Mars: three daring missions take aim at the red planet
By Alexandra Witze, Elizabeth Gibney & Smriti Felicitas Mallapaty
The 1st-ever Mars helicopter will start flying next year. Here's how.
By Elizabeth Howell
Summer on Mars: NASA's Perseverance Rover Is One of Three Missions Ready to Launch
By Jonathan O'Callaghan