Satellite images reveal thousands of mounds on Mars suggesting wetter past

Recent research has identified thousands of mounds on Mars, suggesting the planet had a wetter past. High-resolution images reveal these formations contain clay minerals, indicating that liquid water flowed on Mars' surface nearly four billion years ago. The mounds, located in Chryse Planitia, may be remnants of a highland region eroded by water. This supports the theory that Mars' northern hemisphere could have once held a vast ocean, although this idea remains debated among scientists. Future exploration missions, including the European Space Agency's Rosalind Franklin rover set for 2028, aim to study these mounds. Understanding their formation may provide insights into both Mars' history and early Earth.