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LongTermGuy
07-07-2015, 12:35 AM
`University of North Carolina Chapel Hill graduate student Daniel Bowman designed infrasound microphones that were flown into near-space on a high-altitude balloon flight conducted by NASA and the Louisiana Space Consortium last year. It recorded mysterious hisses and whistles that sound`



Video:

https://screen.yahoo.com/slate/mysterious-sounds-above-earth-164506547.html