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TIL about the ‘Doppler effect’ which explains why a siren's pitch changes as it passes by

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VM6VB TIL about Ashley's Sack. Ashley, a slave, was sold at nine years old. Her mother provided a cotton sack as a parting gift. Telling her "it be filled with my love always", it contained a tattered dress, a handful of pecans, and a braid of her mother's hair.
R967 TIL Article 11 of the Treaty of Tripoli, signed by John Adams, contains the line “The Government of the United States of America is not, in any sense, founded on the Christian religion”
pagO TIL Burning Mountain in Australia is the site of a coal fire which has been burning for 6,000 years.
p8OKZ TIL: In the movie Rampage, when Dwayne Johnson signs his character's name (Davis Okoye) to George the Gorilla, it's actually American Sign Language for 'Rock'.
WklX TIL Aquafina and Dasani are nothing more than tap water.