Curiosity rover discovers 'sea of polygons' on Mars

NASA's Curiosity rover has transmitted striking panoramic images from Mars's Valle Grande, located at the foot of Mount Sharp. The rover's cameras have captured an unusual geological formation: a vast expanse of honeycomb-like polygonal cracks. This discovery offers a new glimpse into the dynamic geological history of the Red Planet.

The detailed images, taken on June 19 and 20, reveal individual polygonal cells ranging from 4 to 8 centimeters in size. These intricate patterns stretch across the valley floor, even encircling the Miraflores rock formation, a 6-meter-high feature capped with light-colored sand. The visual resemblance to terrestrial geological phenomena has intrigued scientists at NASA's Jet Propulsion Laboratory.

Researchers are drawing parallels between the Martian cracks and similar structures found in Arctic regions on Earth. These terrestrial formations typically arise from the cycles of freezing and thawing of wet soil, leading to contraction and cracking. The comparison suggests that similar environmental processes, involving moisture and temperature fluctuations, may have shaped the Martian landscape over billions of years.

This finding adds to the growing body of evidence suggesting that Mars once harbored a wetter environment. Over its 14 years of operation, Curiosity has gathered data indicating that the foothills of the 5-kilometer-high Mount Sharp were once crisscrossed by a network of lakes and streams. By analyzing the chemical composition of the rocks, researchers aim to further understand the processes of water evaporation from the planet's surface, piecing together the story of Mars's ancient climate.