In the early hours of Sept. 7, NASA broke a world record. Less than 2 minutes after the launch of a 58-foot-tall (17.7-meter) Black Brant IX sounding rocket, a payload separated and began its dive ...
Landing on Mars is difficult and not always successful. A fair number of missions to the Martian surface have failed, even some launched by the U.S. But we've been on something of a roll since 2003 ...
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