Trumpet sounds in the sky - Strange Sounds
https://strangesounds.org/strange-sounds
WEBApr 25, 2014 · The strange sounds from the sky started back in 2008 and are still recorded today in 2015 on videos by people all around the world. But what are these humming noises coming from the sky? Why do they vary in intensity? Some ressemble a loud engine, a rumbling, the slamming metallic door or even a lithning stike, others more like a groaning.
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