Sounds from the sky? HAARP….Same as for clouds turning red, weird cloud formations, unexpected storms floods and blizzards and highly suspect for unexplained violent moods for people in specified areas…
We are their test persons… We are their guinea pigs!
We are just a small part of nature that appears and disappears. And nature lives forever.
Such unusual sounds and phenomena are usually appropriate to use during a presentation for good attention grabbers for essays. This is one of the proven ways to get a good grade in a presentation of a work, but few students know about it.