Curiosity Spots Vast Honeycomb Rock Pattern on Mars, Hinting at Repeated Wet-Dry Cycles
NASA’s Curiosity rover has returned new images from Mars showing rock surfaces covered in dense, honeycomb-like polygons near a small feature called Antofagasta crater. The repeating pattern, captured in mid-April 2026, stands out for its sheer extent across the ground.
Project scientist Abigail Fraeman of NASA’s Jet Propulsion Laboratory described the scene as thousands of honeycomb-shaped polygons visible in Curiosity’s Mastcam mosaics. Similar polygonal textures have been seen before, but not in such dramatic abundance over meters of terrain.
What could the patterns mean?
On Earth, polygonal crack networks commonly form when wet ground dries and shrinks, creating desiccation cracks that evolve over multiple cycles. Comparable patterns can also develop in cold regions as freezing and thawing repeatedly expands and contracts ice within soil.
On Mars, clear signs of desiccation-style cracking are considered less common because the planet lost most stable surface water billions of years ago. Curiosity previously helped identify ancient mud-crack evidence in Gale crater, supporting a history that included at least intermittent drying events.
Clues from a 2023 Mars discovery
The new find is drawing comparisons to polygonal formations reported in 2023 at a site called Pontours, where researchers linked well-preserved hexagons to repeated wet-dry cycles rather than a single drying episode. That interpretation suggested a climate that swung between wetter and drier conditions before the textures were preserved in rock.
Antofagasta may record a related process, but there are notable differences, including raised ridges that could indicate minerals later filled the cracks and resisted erosion. Scientists will rely on Curiosity’s close-up imaging and chemical measurements to test competing ideas about how the honeycomb textures formed.
For now, the discovery adds to a growing set of observations implying Mars’ water history was more variable than its modern dusty surface suggests. Curiosity has moved on, but the data collected at Antofagasta is expected to keep teams busy as they work to reconstruct the environment that produced the striking pattern.
