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Scientists investigating 50-year global 'earth hum' discovered it may be an 'inside job'

Scientists Investigating 50-Year Global 'Earth Hum' Discovered It May Be an 'Inside Job' ...

A Mysterious Hum Has Plagued the Earth for 50 Years. Scientists May Have Finally Found Its Source.

Since the 1970s, people across the world have reported hearing an inexplicable low-frequency droning. Scientists now think they know what it is.
UNILAD

Scientists finally think they know the cause of mysterious 'hum' sound heard by people across the globe

It first became a talking point in the 1970s after residents of one UK city started reporting the same strange noise ...
Mental Floss

The Mystery of the "Global Hum," the Droning Sound Reported By Thousands

Imagine spending your life listening to a low humming sound that never stops and that no one else can hear. That’s the reality for thousands of people who report hearing a sound sometimes labeled the ...