NASA's Perseverance Rover Discovers Evidence of Ancient Lake on Mars In a groundbreaking discovery, NASA's Perseverance rover has uncovered evidence of a massive lake that existed on Mars millions of years ago. The rover, which has been exploring the Martian surface since 2021, has been studying the Jezero crater, a 45-kilometer-wide impact crater that was once home to a lake. According to NASA scientists, the rover's findings suggest that the lake was a significant body of water that could have potentially supported life on the Red Planet. The discovery has significant implications for the search for extraterrestrial life and could shed new light on the history of Mars.