when did the mars rovers land on mars?
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The Mars rovers “Spirit” and “Opportunity” landed on Mars in January 2004.  The rovers have been exploring the Martian surface for over 15 years, communicating observations of their environment back to earth for scientific analysis.  The rovers have made significant discoveries about Mars, including evidence for past liquid water on the Martian surface and strong evidence for an ancient Martian ocean.  The rovers have also demonstrated the ability of robotic probes to operate for long periods of time on the surface of another planet.  Mission manager Steve Squyres of Cornell University has said that their discoveries have completely changed our current understanding of the history of Mars.  The rovers were built by the Jet Propulsion Laboratory and are managed
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when did the mars rovers land on mars?
user
The Mars rovers “Spirit” and “Opportunity” landed on Mars in January 2004.  The rovers have been exploring the Martian surface for over 15 years, communicating observations of their environment back to earth for scientific analysis.  The rovers have made significant discoveries about Mars, including evidence for past liquid water on the Martian surface and strong evidence for an ancient Martian ocean.  The rovers have also demonstrated the ability of robotic probes to operate for long periods of time on the surface of another planet.  Mission manager Steve Squyres of Cornell University has said that their discoveries have completely changed our current understanding of the history of Mars.  The rovers were built by the Jet Propulsion Laboratory and are managed
assistant
when did the mars rovers land on mars?