NASA's Perseverance Rover Discovers Evidence of Ancient Lake on Mars A groundbreaking discovery has been made by NASA's Perseverance rover, which has been exploring the Martian terrain since 2021. According to a recent report, the rover has uncovered evidence of an ancient lake on Mars, shedding new light on the planet's mysterious past. The lake, which is believed to have existed around 3.5 billion years ago, would have provided a habitable environment for life to thrive. This finding has significant implications for the search for extraterrestrial life and could potentially rewrite the history of Mars' evolution.