In many places around the world, locals report a persistent rumbling sound known as the

hum.

Some hear it, some don't, sometimes it's intermittent, other places it's been there as long as anyone

can remember.

Today, we're going to take both a look and a listen at this strange phenomenon, and see

if the explanation is natural, man-made, physiological, or something else.

The hum is coming right up, unskeptoid.

Hey everyone, Brian here.

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Thanks.

You're listening to Skeptoid.

I'm Brian Dunning from Skeptoid.com.

When you hear the hum, close the windows, turn off the electricity, and be very quiet.

We're listening for the hum, a worldwide phenomenon in which a distant rumbling sound can be

...