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TIL Aluminum is so expensive to smelt from ore, yet so cheap to recycle, that up to 75% of all aluminum ever mined is still in use today

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OoAXL TIL Soviet scientists defended the world's largest seed bank during the 28 month Siege of Leningrad when it couldn't be evacuated. 9 scientists starved, surrounded by tons of crops and fruit, refusing to destroy 'the future of Russia'.
Ypra7 TIL that the British and the EIC stole nearly $45 trillion dollars from India over a period of 173 years, stalling the development of the Indian subcontinent.
XE498 TIL of the Digital dark age, a time that may come when historical documents and pictures will be inaccessible to future generations due to out of date software, hardware and file formats.
8anja TIL that a lot of popular horror movies use an unique instrument to create creepy and eery sounds : the waterphone
8aV7V TIL about the high levels of PTSD in low-income, urban neighborhoods in the United States. A sample of 1900 patients in Atlanta's Grady Memorial Hospital found that 87.8% of the sample suffered at least one-lifetime traumatic event, and the lifetime prevalence of PTSD was 46.2%.