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TIL That Mary Shelly finished writing her masterpiece Frankenstein at the age of 19.

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deaK TIL in 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
wLM4o TIL that Vikings traveled with their cats and gave cats as wedding gifts
QJpad TIL that wrasse (a kind of cleaning fish) can keep track of over 100 regular clients. They sometimes cheat certain clients, and if those clients get angry and chase them, they offer a complimentary fin massage. They can also outperform chimps on certain mental impermanence tests.
xVRD7 TIL about 'Pluto Lamps', Victorian Era street lights that sold hot coffee and soup.
rEJ1 TIL American poet and activist Alice Dunbar Nelson was rejected by both the white and the black society because white people found she was “too black” and black people found she was “too white”.