NASA's High Altitude Student Platform floated a helium balloon with numerous attached microphones to it into the stratosphere. The microphones have recorded numerous "infrasounds," which many believe are the sounds of aliens.

These infrasound's were recorded in the stratosphere, which is located more than 20 miles above the surface of Earth. These sounds are known as infrasound's as they are below the optimum frequency that the human beings can hear.

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Human beings can not hear these alien-sounds as they are below 20 hertz; however, later when they were tweaked around to be made audible to the human ears, then they caught everyone by surprise as they are quite like the "The X-Files," according to Huffington Post.

The helium balloons that recorded these sounds were sent to the atmosphere on Aug. 9, 2014, into the region above Arizona. They traveled for nine hours before eventually reaching their intended destination, as reported by Daily Times Gazette.

Daniel Bowman, who is a graduate student at the University of North Carolina and the team leader of this program, said that to get the optimum results, he put the microphones on the balloons as they wanted to negate the noises of the wind. As the balloons fly at the same velocity as the wind, the team managed to get the most optimum results that have been obtained in such an endeavor.

The sounds are still being studied by Bowman's team, and the scientists as well, in order to interpret them and draw conclusions from them. Bowman said that he believes they are the accumulation of multiple things like the roar of a commercial aircraft, air disturbances, sound of the Atlantic ocean waves and other activities related to the helium balloons themselves.

At the annual meeting of the Seismological Society of America, this research was presented to the public.

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