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TIL that John Bonham regularly had a blood-alcohol concentration level of 0.34

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957M TIL A Harvard Professor was able to slow light down so much to the point that it “stopped”.
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PYdRG TIL that satellites in the 1960s used nuclear radiation for power by radioisotope thermoelectric generators. However, in 1964 such a satellite disintegrated and spread approx. 1 kg of radioactive plutonium-238 over the planet. This failure led NASA to develop solar PV energy technology.
e0yxb TIL When Cambridge graduate & visionary electronic composer Delia Derbyshire (who wrote the original Dr Who theme) applied for a position at Decca Records, she was told that they did not employ women in their recording studios.
P17KJ TIL that Pink Floyd’s The Wall is designed as an endless loop. The final track, “Outside the Wall,” ends with “Isn’t this where...”, and the album starts with “... we came in?” continuing the last song’s melody, highlighting the cyclical theme of Water’s concept.