Earth gives off a relentless hum of countless notes completely imperceptible to the human ear, like a giant, exceptionally quiet symphony, but the origin of this sound remains a mystery.
Now unexpected powerful tunes have been discovered in this hum.
The planet emanates a constant rumble far below the limits of human hearing. This sound, first discovered a decade ago, is one that only scientific instruments — seismometers — can detect. Researchers call it Earth's hum.
Investigators suspect this murmur could originate from the churning ocean, or perhaps the roiling atmosphere.
The Earth's hum. I wonder if it knows 'Melancholy Baby'? Hmmmmmmm.
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