Now I know what you're thinking. This must be the Illuminati. I thought the exact same thing, but since the Illuminati isn't real, I think we can actually rule out that possibility.
Last month, the Earth LITERALLY started ringing, in super low frequencies that only your neighbor's sad but still kinda cute dog can hear. And no one knows why.
Seriously, last month the Earth started emitting a "musical" low pitched hum after a series of earthquakes growing in frequency, and then they just stopped. Now we're trying to find some possible explanations. Read on to find out more about what happened, if it might happen again, and why is this even happening in the first place (hint: we still don't really know).