By: SPACE.com Staff Published: 11/09/2012 08:17 AM EST on SPACE.com The mission controllers overseeing NASA's Mars rover Curiosity are finally switching back to working on Earth time after three months of operating in sync with the Red Planet, where the Martian days last 24 hours and 39 minutes. The team in charge of Curiosity's instruments and operations at NASA's Jet Propulsion Laboratory (JPL) in Pasadena, Calif., had been working in shifts aligned with Martian time for the first 90 Mars days, or Sols, of the mission.