Fire. No matter the fuel or the method, it still creates heat.
this post was submitted on 10 Oct 2025
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Dinner plates. Wooden, marble, ceramic or whatever it's made from, it does it's job perfectly.
EDIT: Yes, I'm hungry
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The pointed stick.
No, it was later improved by using different materials, better tools to make it and hardening it with fire.
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On a high level, all simple machines.
The wheel
The lever
The pulley
Etc.
All other machines (except maybe things like computer chips) are just a variation of simple machines, or a combination of them.
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Maybe FM synthesis, it revolutionised the sound of the 1980s and music production as a whole
The 707.
I don't think QR codes have changed at all. Only the tools we use to scan them have
Oh, but they have, and they still are.
Did you know that you can halftone dither two different but same size QR codes on top of each other?
I wish I had a link to the article handy, but yeah I've tried that myself and it totally works! You basically get a 50/50 chance of one or the other code scanning. It's literally two QR codes in one!
And no, that's not some new special QR code format either, it's basically taking advantage of the nature of the scanners plus the built in error correction.
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There are so many 2D barcode formats.
[off topic?]
I can't remember the exact quote, but Robert A. Heinlein said of the DC-3 that it was the best airplane ever built, and that the only way to improve it was to completely redesign it.
I just like the idea that some things are perfect the way they are.
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