Introduction: A Planet That Wasn’t Always Red and Barren Today, Mars is a cold, dry desert with a thin atmosphere and no stable liquid water on its surface. But billions of years ago, it may have looked very different. Scientists now believe that ancient Mars had rivers, lakes, and possibly even oceans—raising one of the most compelling questions in modern science: Did life once exist on Mars? Understanding the possibility of past life on Mars isn’t just about curiosity. It helps us answer a deeper question—how common is life in the universe? Ancient Mars: A Warmer, Wetter World Roughly 3.5 to 4 billion years ago, during a period known as the Noachian era, Mars had conditions that may have supported life. Evidence of Water on Mars Orbital imagery and rover missions have revealed clear signs of ancient water: Valley networks resembling river systems Dried-up lake beds and deltas Minerals like...Read More