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Spirit and Opportunity leave Earth Spirit [left] launched from Earth on June 10, 2003 on a Delta II launch vehicle from Cape
Canaveral Air Force Station, Florida. Three weeks later on July 7, 2003, Opportunity
[right] followed. They traveled on a trajectory that delivered them to Mars in about seven
months. Despite the naysayers, each rover landed safely and took off on expeditions
that surprised everyone. NASA
"We're changing the world. Are you in?" - CEO Bill Nye