China's Zhurong rover, equipped with a ground-penetrating radar system, identified irregular polygonal wedges located at a depth of about 35 meters all along the robot's journey.
Three to four billion years ago, Mars did in fact have running rivers of water. Now, scientists have mapped out an entire ancient river system.
The ESA recently released stunning photos of a Martian storm front, which were acquired by the Mars Express orbiter in April of 2018.
A storm of tiny dust particles on Mars has prompted NASA's Opportunity rover to suspend science operations. The Martian dust storm has grown in size and is now officially a 'planet-encircling' (or 'global') dust event.