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May 6, 2015 04:30 PM ET // Becky Oskin, LiveScience
Eerie sounds from the edge of space were recorded for the first time in 50 years aboard a NASA student balloon experiment.
Jul 21, 2012 04:03 PM ET // Amy Shira Teitel
Neil Armstrong's most impressive bit of flying might be the time he made it back to Edwards after skipping off the atmosphere in an X-15.