The Earth can hum!!! A tune perhaps?

Apparently, researchers from about a decade ago had used seismometers and discovered an interesting sound. A constant rumble coming out from the planet.

They decided to call it the Earth's hum.

This hum is at a level thats too low for humans to hear, (which is why we all had no idea that it was even there) and no.. its not a miniscule earthquake.

There are many speculations as to what the hum could be caused by. (Ocean, atmosphere..) But no one really knows to this day.

*Jamie starts humming Arashi songs....*

Oh yeah nearly forgot.. if you wanna read more about this click here