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TIL the 1965 Spiegelman's Monster experiment demonstrated genetic replication and evolution in real-time at the molecular level, showing how natural selection could drive the emergence of more efficient genetic replication, even in an artificial setting.

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50R9 TIL that during Roman times, Egyptian mummies were sometimes accompanied with a realist portrait of the dead painted on wooden boards. About 900 of these portraits are known to exist.
9wxkX TIL Since October 31st, 2000, there has always been at least one human being in space at all times. That is 8,199 continuous days and counting.
P1nBL TIL the biggest geomagnetic storm in history caused fires in telegraph stations
QRp6 TIL that in the ancient Chinese game of Go, putting someone in check is called “Atari”
neA4b TIL there is a neurological condition called Witzelsucht that gives one an "uncontrollable tendency to pun"