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TIL scientists developed a kind of "inverted sieve", which holds back smaller particles, while letting bigger particles through.

Read more advances.sciencemag.org

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Eg0Px TIL that the 1971 Doors song "Riders on the Storm" partially references an American hitchhiking killer, Billy "Cockeyed" Cook in its lyrics. In 1950-51, Cook murdered six people, including a family of five, on a 22-day rampage between Missouri and California.
eMag TIL That Batwoman was introduced in 1956 in order to quell suspicions that Batman was homosexual.
ne1B9 TIL Rotting potatoes give off a noxious gas that can knock a person unconscious & even cause death.
d8D68 TIL of Jean Meslier, who was a French Catholic priest, who was discovered, upon his death, to have written a book-length philosophical essay promoting atheism. From Meslier, Diderot is said to have derived the quote "And with the guts of the last priest let's strangle the neck of the last king".
xV7wD TIL JRR Tolkien (Author of the Hobbit, Lord of the Rings) would hand-write, illustrate, envelop, seal, stamp letters from "Father Christmas" to each of his children each year.