A detailed account of how East German researchers developed and ported Unix systems in 1990, highlighting key milestones and ongoing uncertainties.
Unix in East Germany (GDR) (1990)
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TIL there exists a shape that, instead of having a clean “inside” and “outside”, has a clean “inside” but the outside world is segmented and split. It is called the Alexander Horned Sphere
Mathematicians have identified a topological shape, the Alexander horned sphere, with a boundary that defies traditional inside/outside definitions, challenging existing topology principles.
Speculators rush into copper as sulfur supply risk, AI drive up prices
Copper prices surge as speculation increases due to sulfur supply risks from Middle East conflicts and AI-driven demand, nearing record highs.
