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NASA’s Curiosity and Perseverance rovers have successfully captured two highly detailed, 360-degree panoramas of the Martian surface. These sophisticated images offer scientists a comprehensive view of how two distinct missions are simultaneously uncovering the formation of the Red Planet, its ancient watery past, and the potential for microbial life. Although the rovers explore regions separated by 2,345 miles—a distance comparable to the span between Los Angeles and Washington, D.C.—both are investigating geological formations that are billions of years old. However, their trajectories through time move in opposite directions.
The Curiosity rover, which has been operational for nearly fifteen years, is ascending Mount Sharp to reach increasingly younger terrain. In contrast, the Perseverance rover, which has been active for approximately five years, is traversing some of the oldest landscapes in the entire solar system. By examining these distinct geological eras, the two rovers are providing critical data to fill in missing details about Mars’s complex history.
To construct a comprehensive 360-degree panorama, the Curiosity rover captured 1,031 individual images over a period of several weeks. The resulting composite image provides a high-resolution view of a region characterized by a large network of structures known as boxwork formations. From orbit, these low ridges resemble giant spiderwebs. These ridges formed billions of years ago when groundwater flowed through extensive cracks in the planet’s bedrock. Minerals carried by the water precipitated out of the solution, hardening the rock along the fractures. Because this hardened rock was more resistant to erosion than the surrounding material, the ridges remained visible while the softer rock eroded away. Although both landscapes are now cold, dry deserts, these rock formations provide clear evidence of a much more active and wet geological past.
When the Curiosity rover landed inside Gale Crater in 2012, its primary scientific objective was to determine whether Mars once possessed the necessary conditions to support life. Within its first year of operation, Curiosity drilled a sample from an ancient lakebed. Subsequent analysis of this sample confirmed that the required conditions for life had indeed been present. These conditions included the correct chemical composition and potential nutrients that microbial life could have utilized for metabolism.
Since 2014, Curiosity has been slowly ascending Mount Sharp, a mountain that rises three miles above the floor of Gale Crater. The mountain began to form when layers of sediment were deposited in a series of ancient lakes. Long after those lakes dried up, smaller ponds and streams returned multiple times, each wet period leaving its own distinct record in the mountain’s rock layers. The layers that formed during drier eras are also preserved. The lowest layers of the mountain are the oldest, while the higher layers are younger. Consequently, as Curiosity climbs the mountain, it travels backward through geological time, allowing scientists to study the planet’s evolution in reverse chronological order.
In one recent discovery, the Curiosity team identified the mineral siderite. Scientists believe this mineral may be storing carbon dioxide, which was likely part of a thicker, early Martian atmosphere. Scientists had long suspected that minerals like siderite formed when carbon dioxide gas dissolved into ancient lakes. However, such mineral deposits had been extremely difficult to find on Mars until now. The identification of siderite provides tangible evidence of the ancient atmospheric processes that once shaped the planet.
Curiosity also announced the detection of three of the largest organic molecules ever found on Mars. These molecules originated from a rock sample the rover drilled in 2013. They are long-chain hydrocarbons that could possibly be the broken-down remnants of substances like fatty acids. Finding them represents a major milestone in the search for complex chemistry on Mars. This type of chemistry is a fundamental prerequisite for the development of life. In another significant finding, Curiosity drilled and analyzed a different rock in 2020. This rock contained the most diverse collection of organic molecules ever identified on Mars. Scientists identified 21 different carbon-containing molecules in the sample. Seven of these molecules had never been detected on Mars before, highlighting the planet’s complex organic history.
Perseverance landed in Mars’ Jezero Crater in 2021. Its mission is to study the origin of the ancient rocks inside the crater and to hunt for evidence that microbial life once existed there. Billions of years ago, molten rock cooled to form the floor of Jezero Crater. Later, a river flowed into the crater and fed a lake. The river left behind layers of sediment. Any traces of ancient microbes could have been preserved within these sediments. In 2024, the Perseverance mission discovered a rock nicknamed "Cheyava Falls." The rock was dotted with a pattern scientists call "leopard spots." On Earth, this kind of pattern is formed by chemical reactions that microbes create in rocks. The presence of such patterns on Mars suggests similar biological or chemical processes may have occurred.
Curiosity and Perseverance handle their rock samples in very different ways. Curiosity pulverizes, or crushes, its rock samples into powder for immediate analysis using its onboard laboratory. In contrast, Perseverance collects samples as intact rock cores. Each core is about the size of a piece of chalk used on a blackboard. The rover seals these cores inside special metal tubes. Perseverance has collected 23 samples so far and keeps most of them stored inside itself. The rover did leave a backup set of 10 sample tubes in a specific location on the surface, called a sample depot. Scientists hope that a future mission will retrieve these sealed samples and bring them back to Earth. In laboratories on Earth, scientists can study the rocks with instruments that are far bigger and more complicated than anything that can be sent to Mars. This sample return campaign is considered essential for answering the biggest questions about Mars’s habitability.
While Perseverance searches for signs of ancient life, it also studies other aspects of the Red Planet. For example, mission scientists shared the first-ever recordings of electrical sparks inside Martian dust devils. Dust devils are small, swirling columns of wind and dust. Scientists had only theorized that these sparks could occur before Perseverance’s microphones actually recorded them. The ability to hear these phenomena provides new insights into the electrical properties of the Martian atmosphere. In a separate study, scientists explained how one of Perseverance’s sensitive cameras captured the first visible light auroras ever seen from the surface of another planet. This observation expands our understanding of how the Martian atmosphere interacts with solar radiation.
Both missions are enthusiastic about the discoveries to come as they continue to explore Mars. Curiosity has now left the region with the boxwork formations behind. It is currently exploring a mountain layer that is rich in salty minerals called sulfates. Meanwhile, Perseverance will keep traveling toward locations that contain exceptionally old terrain. One of its future destinations is a place the team calls "Singing Canyon." The rovers continue to provide unprecedented insights into the history of Mars, offering a window into a planet that was once vastly different from the arid world we see today. Their combined efforts are rewriting the textbook on Martian geology and astrobiology.