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TIL That biphasic sleep was a common practice in pre-industrial societies where people would have their first sleep around 9 p.m. or 10 p.m., wake up around midnight then wake up for one or two hours to engage in activities such as reading, praying, or working

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AgPB TIL that the ‘Bridge of Sighs’ in Venice is named that because it was the last sight that convicts would see of Venice.
ElLW TIL In the 1950s, full size B-47 nuclear bombers would do a partial backflip called an “Immelman maneuver” and fling their nuclear weapons in a parabolic arc towards the target . This was so they would not be consumed by the 40,000 foot tall fireball from their own weapons.
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