Title: I am collecting my favorite internet rabbit holes on my website (https:&#x2F;&#x2F;ph-uhl.com&#x2F;links&#x2F;internet-rabbit-holes&#x2F;) and went through my old lists but I think I lost a few of the good ones.<p>So I was wandering, what are your favorites? The stuff that you loose a night to, when finding it?
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