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Abigail Allwood (second from left), principal investigator of the Planetary Instrument for X-ray Lithochemistry (PIXL) aboard NASA's Perseverance Mars rover, is seen here examining rocks at a site in Greenland. Allwood is a scientist based at NASA's Jet Propulsion Laboratory in Southern California. A key objective for Perseverance's mission on Mars is astrobiology, including the search for signs of ancient microbial life. The rover will characterize the planet's geology and past climate, pave the way for human exploration of the Red Planet, and be the first mission to collect and cache Martia…
