Life on Mars at Earth’s Extremes | Dr. Pacifica Sommers

What can Antarctica teach us about Mars?

This week on Aspiring Martians, I sit down with biologist, data scientist, educator, and Mars analog astronaut Pacifica Sommers to explore how some of Earth’s most extreme environments are shaping the future of human space exploration.

Pacifica’s career has taken her from the blistering deserts of Arizona to the frozen Dry Valleys of Antarctica, studying everything from invasive grasses and microbes to the invisible ecosystems that survive beneath glaciers. Today she works in metagenomics at Bayer Crop Sciences while continuing her research with the University of Colorado Boulder, all driven by a fascination with how life adapts under extraordinary conditions.

Recently, she added another environment to that list: Mars.

Pacifica shares what it was like participating in a Mars Desert Research Station analog mission, where researchers studied how crews make decisions under pressure while navigating simulated EVAs, conflicting information, and the psychological demands of isolation. We discuss what these missions reveal about future human expeditions to Mars and why analog astronauts may play an important role in preparing us for becoming a multiplanetary species.

We also dive into why humans still matter in exploration even as robots become increasingly capable, how growing food for Mars could transform agriculture here on Earth, what NASA looks for in astronaut candidates, and why inspiring the next generation of explorers may ultimately be just as important as sending the first people to Mars.

• University of Arizona Sky School: https://skyschool.arizona.edu/
• Girls* on Rock: https://www.inspiringgirls.org/gor
• Martian Greenhouse: https://sites.google.com/view/martiangreenhouse/home

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A huge thank you to Pacifica for taking the time to join metoday and for sharing her incredible curiosity, insights, and passion for exploration. And of course, thank you to Nick Thorburn for the stellar theme music, Ceci Giglio for the incredible graphics, Jero Squartini for the amazinganimations, to RDan, Leila, Inka, and Carl for admining the Facebook group, and to my family for supporting this project—even when our conversations somehow end up talking about avalanches on another planet.