The Aztec Death Whistle is capable of creating the 'most terrifying sound in the world' and scientists have - for some bizarre reason - decided to recreate that exact noise with the help of 3D printing.
While some scientists focus on tackling the climate crisis, others spend their time recreating the scariest f****** noise known to man.
Watch below to hear the 'the scream of a thousand corpses':
What the heck is the Aztec Death Whistle, you may ask?
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Well, we don't actually know why the the skull-shaped whistle was created, or whether it was made intentionally.
Some believe that hundreds of warriors would use the whistles at the same time. However, there is little evidence to support this claim.
All we do know is that not long after it was discovered in Mexico in the late 1990s, a scientist randomly blew into the hole in the top of it, causing a scary-ass noise in the process.
James J. Orgill, presenter of YouTube channel The Action Lab, took to the channel to give us more detail.
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"This has been deemed the most terrifying sound in the world," he explained.
"Believe it or not, this is not a human scream.
"The sound that the death whistle makes innately strikes fear into your heart.
"Archaeologists first thought that this must be some sort of toy and they didn't think much about it."
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In the video, Orgill tries out modern versions of the Aztec Death Whistle made by a 3D printer from HeyGears.
"It wasn't until 15 years later for some reason a scientist blew into the hole in the top of it and this is the sound that came out.
"It was a startling discovery because it sounded like a screaming human.
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"For some reason the effect of making it sound like a scream is stronger when you don't actually watch the person blowing into the whistle.
"[This is] probably because your brain knows it's a whistle."
Commenting on the clip, one person said: "My volume was turned up and I was jut thinking it was gonna be another chill video. Then a series of screams came without warning, and boy it struck fear into me."
Another added: "Imagine watching this full volume in public, definitely not what I just did..."
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While someone else suggested: "Maybe it was just because I was prepared for something unpleasant, but I wasn't particularly scared of that sound. Though it did give me weird internal feeling, one which I can't really describe."
For me, the most confusing part about all this is the initial decision to blow a skeleton in the first place.
Topics: Science, Weird, YouTube