Cool stuff you've found

What have you found recently or even in the distant past that’s blown your mind a little bit?

I’m often left dealing with hideously complex engineering systems, and I’ve always had a fascination with how they ever got started. So this made my eyes light up:

Clickspring’s primitive precision lathe


Dividing things in perspective. Pretty much the intersection of art and engineering.

Perspective Drawing 7 - Division & Duplication [Useful Techniques]


@Mythos is there any way to do video embedding?

Are we talking YouTube? Video upload?

YouTube videos should work by just pasting the URL in its own line:

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Seeing this warms my heart,
though i’m biased as I didn’t know anything about the beta until years after the fact, and only saw this once long long before