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Holes

xkcd.com

31–40 of 46 posts

Re: Holes

#31
post #14

What's at 12,000 meters deep? What are they afraid of?

Nothing of great interest. That's a tiny scratch in the surface of the planet, less than 1% of the radius.

On the other hand although we lack the technology you'd need to destroy the damp rock where we live, we only live on some dry-ish outside surface parts of the rock, and we could trash that part and drive ourselves extinct. "Oops"

Re: Holes

#32
post #14

What's at 12,000 meters deep? What are they afraid of?

Nothing of great interest. That's a tiny scratch in the surface of the planet, less than 1% of the radius. On the other hand although we lack the technology you'd need to destroy the damp rock where we live, we only live on some dry-ish outside surface parts of the rock, and we could trash that part and drive ourselves extinct. "Oops"

They were asking why the two deepest holes, despite being nowhere near each other, dug decades apart, are 99.3% of 12km and 99.5% of 12km respectively. Was BP symbolically honoring the russian scientists? Does the earth have an extremely uniform material property that happens to be at a very round number of km? Just a complete coincidence all around?

(I asked AI, and it says coincidence, since BP stopped drilling once they hit oil, and the russians stopped drilling once they hit some melty rock.)

Re: Holes

#33
Can we update the link to https://xkcd.com/3266/

Anyone who wants the large image can click/tap the image, but the revere is harder to do.

In the other direction, Mt. Everest is 8,848.86 meters above sea level. I guess we don't include Lake Tahoe and/or Crater Lake because even though they're deep(ish), their bottoms are above way sea level?

Re: Holes

#34
post #24

Hover text is "If you're thinking 'Wait, a giant crystal cave in Mexico? What's that?' then I'm SO excited for the image search you're about to do."

Forget about that, I just learned there’s a salt mine under Detroit!

Re: Holes

#37
It's funny this came out today! Just at lunch we were googling the highest and lowest capitals of the world. Lowest is Baku in Azerbaijan, at -28m!

Re: Holes

#39

Lake Baikal sediment layer almost as deep as the Mariana Trench: https://en.wikipedia.org/wiki/Lake_Baikal#Geography_and_hydr... [...] and below this lies some 7 km (4.3 mi) of sediment, placing the rift floor some 8–11 km (5.0–6.8 mi) below the surface, the deepest continental rift on Earth.

Oh right. Basically China has its own tectonic plate, with Baikal on the rift, top left: https://en.wikipedia.org/wiki/Amur_plate I did not know that.

You may enjoy the new global tectonic map with 11000 features and 1180 "tectonic plates". https://doi.org/10.1111/ter.12662, also available on Google maps: https://www.google.com/maps/d/viewer?mid=1dXnQlelic4WjA4xKnY...

Re: Holes

#40
post #24

Hover text is "If you're thinking 'Wait, a giant crystal cave in Mexico? What's that?' then I'm SO excited for the image search you're about to do."

Forget about that, I just learned there’s a salt mine under Detroit!

There's also one under Yerevan, Arnenia. Funnily, the altitude differences in the city are so large that the bottom of the mine is still higher above sea level than the city center.
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