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TIL that the largest data array is being constructed in California, it will hold up to 120,000 Terabytes of memory. It’s made of 200,000 separate hard drives all interlaced.

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vmmB TIL that if you pull back and let go of the string of a compound bow without an arrow, it is possible that the bow will explode.
WkbDo TIL that in 2013, an HIV-positive Colombian man was infected with cancer cells from his tapeworm
xVxO0 TIL the Yakuza (Japanese mafia) are known for handing out candy to neighborhood kids on Halloween, but were banned from doing so in 2020. Normally they dress up their headquarters and wear costumes.
e06gJ TIL that in 2007 a Swiss infantry unit got lost and inadvertently crossed 1.5 km into Liechtenstein. The accidental invasion ended when the unit realized their mistake and turned back. When the Swiss army apologized, Liechtenstein's reply was, ‘No problem, these things happen.’
mxMlY TIL Marie Curie's annex lab in Arcueil is sometimes called Chernobyl on the Seine. The lab closed in 1978 but radium has a half-life of 1,600 years, and there are traces of a uranium isotope at the Curie annex with a half-life of 4.5 billion years. The cleanup has so far cost about €10 million.