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TIL in 2006 a design for masks made out of pre-shrunk T-shirts was published for situations when N95 masks were unavailable.

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via reddit.com

E17bX TIL that How Scientists Have Uncovered The 90,000-Year-Old Hybrid Of Two Extinct Human Species
nW85r TIL that actor Tom Hanks is distantly related to "Mister Rogers' Neighborhood" host Fred Rogers. Hanks is sixth cousins with Rogers, and they share the same great-great-great-great-great-grandfather, Johannes Mefford.
XdO8 TIL The ‘Irish Giant’ Charles Byrne was so afraid that the surgeon John Hunter wanted his body dissection and display, he arranged to be buried at sea. Hunter snatched Byrne’s cadaver on the way to the burial, reduced Byrne’s body to its skeleton and put it in his museum where it still remains
0we6A TIL Those who see Earth from space experience “The Overview Effect:” A remarkable sense of connection with the rest of the human race, and a desire for world peace.
eVl6 TIL that armed with just a baton, an officer of the Mumbai Police charged a terrorist wielding an AK-47 and held the barrel of the gun long enough for his colleagues to apprehend him. The policeman died in the process.