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Curiosity, NASA's Mars rover, has begun ascending a valley scientists have nicknamed "Valle Grande," and the images it's beaming back show something the mission team recognizes well but has never seen at this scale: polygonal fracture patterns forming a honeycomb-like texture across the terrain, with each shape spanning roughly 1.5 to 3 inches (4 to 8 centimetres).

While the rover has documented small clusters of these geometric formations before, nothing compares to what's now visible in this valley.

A 360-degree panorama captured over two days, June 19 and 20, corresponding to sols 4,930 and 4,931 of the mission, reveals these polygon shapes extending outward in every direction, as far as the rover's cameras can capture. The pattern is so pervasive that it even climbs the flanks of a nearby butte the team calls "Miraflores," a 20-foot (6-meter) formation capped with a thick layer of sand.

Ashwin Vasavada, the mission's project scientist at NASA's Jet Propulsion Laboratory in Southern California, described the discovery as genuinely striking, noting that despite the many remarkable landscapes Curiosity has revealed over the years, this expanse of polygons stood out.

He added that the team has been carefully analysing the shapes and their chemical composition, hoping the data will reveal clues about how these distinctive features came to form.

In some cases the mission has previously encountered, these polygon patterns clearly formed as mud cracks, though scientists note that several different processes can produce this kind of honeycomb texture, among them, repeated cycles of warm and cold temperatures, or compression that pushed water out of buried sediment.

This newest find joins a long list of surprises Curiosity has rolled past since touching down on the Martian surface 14 years ago, on August 5, 2012. Alongside discoveries like sulfur crystals, shiny meteorite fragments, and other striking geological formations, the rover has helped reveal something far more significant about the planet's past: that ancient Mars once had the water, chemistry, and nutrients necessary to potentially sustain microbial life.

Billions of years ago, the lower slopes of Mount Sharp, a mountain roughly 3 miles (5 kilometres) tall that Curiosity has been climbing since 2014, were dotted with lakes and streams. Over the course of its mission, the rover has uncovered chemical evidence of this watery past, including carbon-based molecules that scientists believe may be precursors to RNA and DNA, the two nucleic acids responsible for carrying genetic information.

Researchers can't yet determine whether these organic molecules originated from biological activity or purely geological processes, both remain plausible explanations, but their presence reinforces that early Mars possessed the chemical building blocks needed to potentially support life.

Managed by Caltech in Pasadena, JPL built Curiosity and leads the mission on behalf of NASA’s Science Mission Directorate in Washington as part of the agency’s Mars Exploration Program portfolio.

Reference:

NASA (2026, 29 July). NASA’s Curiosity Mars Rover Discovers Field of Honeycomb Textures. https://www.nasa.gov/missions/mars-science-laboratory/curiosity-rover/nasas-curiosity-mars-rover-discovers-field-of-honeycomb-textures/

About Coram Deo

Coram Deo — before the face of God. This blog reflects on Scripture, world events, science, music, psychology, and the human mind — always through the lens of Christian faith. All of life is lived before the face of God.