In the 1900s, the U.S. warmed everywhere except the Southeast, where warming didn't begin till the 1990s. A study finds air quality improvements may have played a role.
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On This Day: Apollo 12 Lands on the Moon
NASA NASA astronaut Alan Bean steps off the lunar module ladder in this photo from Nov. 19, 1969, joining astronaut Charles Conra...
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NASA has exercised the second option of its Information Technology and Multimedia Services (ITAMS) contract with DB Consulting Group, Inc., ...
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NASA's MAVEN spacecraft performed a previously unscheduled maneuver this week to avoid a collision in the near future with Mars' ...
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