The Earth's hum comes from the bottom of the sea and not from turbulence in the atmosphere, says a US researcher, backing a novel theory put forward in 2004.
The hum is a low rumble continually present in the ground even when there are no earthquakes happening, but is detectable only by very sensitive seismometers. Its frequency is near 10 millihertz, below the range of human hearing.
(New Scientist)
Something on the bottom of the ocean is humming? And we're hung up on Anna Nicole Smith? Whoa, dude.
Of course if this "rumble" is "below the range of human hearing," that (alas) rules the US Congress out.
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