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TIL that Markus Persson, the billionaire creator of Minecraft, never finished high school

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kOE54 TIL scientists observed the transition of unicellular yeast to multicellularity by repeatedly separating cells by gravity and collecting the cells settled at the bottom of the tubes. The cells eventually formed clusters and subsequent genetic mutations favored the clusters over the individual cells.
pYyvN TIL that Euclid's Parallel Postulate had no mention of parallel lines. Although parallel lines exist as a consequence of the postulate, the postulate actually describes how the opposite case arises: how lines intersect. Parallel lines are the negative case of the postulate: lines that never meet.
b6EG7 TIL that, the astronomer Patrick Moore, whose fiancée was killed by a German bomb in 1943, said in 2012 that “We must take care. The Germans will try again, given another chance” and “the only good Kraut is a dead Kraut.”
X0mLj TIL the highest paid agate ever, sold for $13,500 [warning paywall]
xMJw TIL that in the ‘60s, the C.I.A. paid Vietnamese spies with merchandise from mail-order Sears catalogs, since they had little use for paper money