"Bizarre Underground Polygons Uncovered by Mars Rover Spark Scientific Mystery"

China's Zhurong rover discovered polygonal wedges 35 kilometers underground on Mars, indicating serious climatic changes 3.7 to 2.9 billion years ago. These shapes, possibly formed due to freezing in a cold environment, were detected using ground-penetrating radar and could provide insights into Mars' past climate conditions and the distribution of ice in its subsurface.