Is there — or was there ever — life on Mars? And will we ever definitively find out? After multiple unmanned missions to Mars, we still can’t answer those questions, but the possibility of life on the Red Planet has intrigued us for decades and our interest in Mars still runs high. Here’s a video produced by the PBS affiliate in San Francisco, California, KQED and their science and environment series QUEST. It looks at our past fascination of Mars and how NASA scientists are hoping the Mars Science Lab rover will help them solve the mysteries of Mars.