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TIL that a whale’s ear wax builds up over the course of its life and can be analysed like tree-rings.

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QJN1k TIL that US POW, Jeremiah Denton, blinked a message in morse code whilst on Vietnamese television, spelling the word "torture." This informed the CIA of conditions in Vietnamese captivity.
kMX5 TIL Tom Berenger once owned a restaurant called Twins, where the waitstaff consisted of 29 sets of identical twins.
epWRn TIL AI scientists put a 1 in 6 chance that AI advances will lead to human extinction or similarly permanent and severe disempowerment of the human species
PAZw TIL that in 1973, three Irish Republican rebels were broken out of a Dublin prison by a helicopter landing in the exercise yard.
d8RN9 TIL when IRA hunger striker Bobby Sands died, the Iranian government renamed Winston Churchill Boulevard, the location of the Embassy of the United Kingdom in Tehran, to Bobby Sands Street, prompting the embassy to move its entrance to avoid using Bobby Sands Street on its letterhead.