February 07
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1979 - Pluto moves inside Neptune's orbit for the first time since either was discovered.
1984 - Space Shuttle program: STS-41-B Mission - Astronauts Bruce McCandless II and Robert L. Stewart make the first untethered space walk using the Manned Maneuvering Unit (MMU).
2007 - The second "Berlin Patient" is given a stem cell transplant which cures his HIV/AIDS.
