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TIL ‘The Bloop’, a loud and ultra-low frequency sound picked up by the NOAA in 1997 and heard at listening stations underwater over 5,000km apart, was not a “sea monster” but the sound of an ice shelf breaking off of Antarctica – an icequake.

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QNG79 TIL prior to 2007, no one had ever seen an echidna ejaculate.
yQABl TIL that the phrase "Keep calm and carry on" was originally coined by the British in 1939 to boost the morale of the public in preparation of mass air attacks on cities during WW2. A copy of the original poster was discovered in 2000, and since then, it has become trending once more.
dDXEZ TIL that the 1983 film 'Scarface' is actually a remake of a 1932 feature of the same name. Both are based on a 1929 novel.
YMbP TIL there was a magazine called Continuum that promoted AIDS denialism that went out of print because both of the editors died of AIDS
NDWE TIL after President Woodrow Wilson suffered a severe stroke in Oct. 1919 his wife (Edith Wilson) began to screen all matters of state and decided which to bring to the bedridden president. In doing so, she de facto ran the executive branch of the government for the remainder of Wilson’s second term.