NASA scientists announced the latest scientific discovery from the space agency's Mars rover. Named Curiosity, it landed on the Red Planet in 2012 as part of NASA's Mars Science Laboratory mission. After years drilling into the Martian surface and analyzing the layers of rock, scientists said they discovered methane compounds buried in the planet's surface. While the compound's discovery wasn't definitive proof of life having once existed on Mars, the researchers said the discovery was important in understanding how the planet could have sustained life, and may still be able to.
NASA Goddard Space Flight Center's Dr. Paul Mahaffy talks about the mission of sending the Curiosity rover to Mars as part of NASA’s Mars Science Laboratory mission.