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To what extent has man explored Mars at present?
1962 mars in the former Soviet union 1 failed to detect mars.
American Mariner 4 flew over Mars.
197 1 years ago, the Soviet mars 2 landed on mars.
1972 mariner 9 flew along the orbit of mars.
1976 pirates 1 and 2 landed on mars.
1989 Phobos 1 and 2 disappeared on the way to Mars.
1993 Mars observers disappeared before reaching the orbit of Mars.
1996 Russian "Mars -96" failed to launch.
1997 Mars global prospector enters Mars orbit.
1997 American Mars Pathfinder landed on Mars.
1998 us launches mars climate probe.
1999 US launches Mars polar landing probe.
In 2003, the United States launched the Spirit and Opportunity Mars probes to land.
In 2003, Europe launched the Mars Express.
In 2007, the United States launched the Phoenix Mars polar landing probe.
In 2009, Russia explored Phobos.
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