Some of you may remember, or even have heard, the scary and sinister noises heard around the world. It seems that no one has heard them in a long time.

First, here are 7 short videos of these noises recorded by people, all in 2012.

I'll let you enjoy them, before the rest.
Now, some of you may have seen this article on "Alice", the Evergreen line tunnel boring machine ?
Now you can have a look at this last video.

Connect the Dots !

Special thank to @butcheraddicted
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