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TIL in 1967, hippies attempted a ritual to levitate the Pentagon in the air to end the Vietnam War.

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ojxL TIL Bill Murray was apparently forced to promote the new Ghostbusters movie under threat of lawsuit (according to leaked Sony emails)
DLpe TIL that from 1661 until 1911, the English monarchy did not own the gems in the crown used for coronation ceremonies. They were hired each time, then detached afterwards.
WpMN TIL residential electrical outlets are usually turned “upside down” to denote that they are connected to a wall-switch.
xw5g TIL flaming pigs were used in ancient warfare as a countermeasure against war elephants.
LQy5d TIL that AI can determine with a high degree of accuracy if fingerprints from different fingers belong to the same person - but it remains a mystery as to how it does this...