Recently, names from the Grand Canyon have appeared on Mars, sparking curiosity about their origins. To uncover the mystery, writer Scott Thybony consulted with scientists from Flagstaff’s Astrogeology Science Center who have been busy studying the Martian landscape.
For years, robotic explorers have been navigating the Martian terrain, sending back captivating images of its rocky and sandy stretches. These visuals provide a mesmerizing glimpse into Mars, and in the summer of 2024, NASA revealed a fascinating rock discovery. This rock exhibited potential biosignatures, including organic compounds and distinctive markings likely resulting from life-related chemical processes.
The Perseverance rover had ventured into an area named Bright Angel, and intriguingly, a Martian rock was dubbed “Cheyava Falls.” This prompted questions about why Grand Canyon names were appearing on Mars. A closer examination of the maps revealed the rover’s traversal through areas like Separation Rapids, Cedar Ridge, and Dox Castle—places familiar from the Grand Canyon.
Driven by curiosity, Thybony arranged a meeting with two dedicated scientists conducting Mars research from their homes in Flagstaff. Ryan Anderson and Alicia Vaughan welcomed him at the USGS Astrogeology Science Center, sharing insights from their experiences, ranging from the thrill of successful landings to the challenge of freeing a rover trapped in sand.
During their discussion, the potential discovery of ancient microbial life on Mars arose. However, both scientists advised caution, as the biosignatures might result from geological processes unrelated to life. Definitive conclusions await the return of core samples to Earth for thorough analysis.
Ryan clarified the use of Grand Canyon names on Mars, explaining, “The landing site is divided into quads, just like we do on Earth for mapping purposes. Each one of those quads is named after a national park somewhere in the world. Once we’re on the surface in that quadrangle, all of our target names are places from within that park.”
Alicia reflected on the similarities and differences between Earth and Mars, noting, “You can look at Mars and see Northern Arizona. You can look at these stacks of rocks and you’re like, ‘Wow, that looks like Sedona.’ They’re so, so similar but missing all the vegetation. That’s just fascinating.”
Ryan, who has been exploring Mars since his graduate studies, and Alicia, who has devoted most of her career to Mars exploration, have developed a deep understanding of the Martian landscape. Ryan mapped the Curiosity rover’s landing site at Gale Crater, while both have spent time at the Jet Propulsion Laboratory in California, analyzing Martian terrains.
Reflecting on his experiences, Ryan shared, “The first time I came back home, it was late summer in Flagstaff with all the wildflowers. I went out to walk the dog in the morning and everything was covered in dew. I’m like, ‘Wow, this is a really nice planet.’ It’s such a contrast to this really, really barren place. It’s . . . covered in life and covered in water everywhere.’”
Indeed, exploring a planet millions of miles away can offer a profound appreciation for the beauty of Earth.
Scott Thybony is a Flagstaff-based writer. His Canyon Commentaries are produced by KNAU Arizona Public Radio.
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