The more scientists study the Red Planet, the more they find unusual objects and patterns scattered across Mars' surface. As one of Earth's closest neighbors in space, Mars has long captivated humans with the prospect of alien life located just a short rocket trip away.

Mariner 4, built by JPL in Pasadena, took the images on July 14, 1965. One of the mission's leaders reflects on decades of studying the Red Planet.

Dark “slope streaks,” likely resulting from dust avalanches, stretch across an area of Mars called Acheron Fossae in this image from the High-Resolution Imaging Science Experiment (HiRISE) camera aboard NASA’s Mars Reconnaissance Orbiter.

Bruno Mars poked fun at the debunked rumors that he owed MGM Resorts $50 million in gambling debt following his BLACKPINK’s concert in Los Angeles on Sunday. The “Treasure” singer, 39, shared an Instagram clip from his onstage appearance the day after and wrote,

The “24K Magic” singer made light of since-denied rumors that his alleged gambling had spiraled out of control

Perseverance's advanced self-driving software enables it to process and analyse images on the move, allowing for longer daily drives.

After its voyage past Mars, Mariner 4 maintained intermittent communication with JPL and returned data about the interplanetary environment for two more years. But by the end of 1967, the spacecraft had suffered close to 100 micrometeoroid impacts and was out of fuel. The mission was officially ended on Dec. 21.