Curiosity Rover selfie

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Astrobiologist Sarah Stewart Johnson is a NASA scientist who has spent her career searching for answers to profound human questions. She helped design America's newest interplanetary, robotic life hunter on Mars called Perseverance, which launched on July 30.

Living on Earth

July 30, 2020 · 1:00 PM EDT

Writer Adam Wernick

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NASA's Curiosity Mars rover took this selfie on May 12, 2019 (the 2405th Martian day, or sol, of the mission). 

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