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 ...
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 ...