Hi, we've got three stories from curiosity.com to help you get smarter in just a few minutes. I'm

Cody Gough. And I'm Ashley Hamer. Today you learn about the biological reason why it's hard to hit the

gym after work, where you might be able to find a quadrillion tons of diamonds, and will answer your

burning questions about air travel. Let's satisfy some curiosity. Actually, are you a diamond person?

I'm not. You know what I think is really cool is meteorites.

Like meteorite jewelry? That's so cool and it's also really rare. Yeah that makes

sense. More rare than diamonds I think. Yeah because diamonds are kind of artificially rare right? Yeah, exactly. It's all a marketing ploy. Yeah. The diamond industry. It's all about meteorites. We won't get into conspiracy theories though. But today we do have a quirky story about diamonds. If you are a diamond

person, you want to listen to this. There might be more than a quadrillion tons of diamonds

deep under the Earth's surface. That's a one followed by 15 zeros. Geological scientists noticed

something strange in their seismic data when they were measuring cratons.

These are the foundations of the foundations under your feet.

Cratons are giant masses of heat-resistant. foundations of the foundations under your feet.

Cratons are giant masses of heat-resistant stone that carry the continental plates on top.

Geologists noticed that whenever a major vibrational wave passed through the roots of a craton, it seemed to move faster than it should be able to.

So researchers built a 3D map of seismic events and the velocities of the

waves they pushed through the kretonic roots.

They developed computer models to figure out how sound waves would interact

with different types of rock, and they realized only one type of stone produced the same types of velocities,

diamonds. According to the team's calculations, the roots of the cratons would only have to be about 1 to 2 percent diamond to produce the sound boosting effect.

There's also a thing called Kimberlight pipes. These are channels of stone and they've been known to erupt

diamonds from time to time. They're also known to connect directly to the roots of

the cratons far far underground. In that case it just makes sense to think that

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