Glacial Activity Discovered on Ancient Mars

Images taken by the NASA Mars Reconnaissance Orbiter (MRO) reveal evidence of glacial activity on Mars, suggesting that the planet experienced glacial and interglacial periods in its past. These features, resembling landforms shaped by ice flows on Earth, can be found in non-polar regions across Mars. The images show linear ridges, exposed rocky debris, and infilling inside craters and valleys, indicating the movement of a retreating glacier. These findings provide insights into Mars' dynamic climate and its transition from a warmer, wetter environment to the cold and desiccated planet we see today.