The United Arab Emirates launched a mission to Mars earlier this month, followed by China days later. And tomorrow, NASA is scheduled to launch its own mission to the red planet that includes a six-wheeled rover called Perseverance, as well as a tiny helicopter. Short Wave reporter Emily Kwong talks with NPR's Joe Palca, who explains why these launches are happening now and the goal of the missions when they get there.Learn more about sponsor message choices: podcastchoices.com/adchoices)NPR Privacy Policy)
