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TIL That Zoroastrianism was the official Religion of the first Persian Empire

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oBZ98 TIL a teletubby toy was recalled in the late 90s for calling kids "faggot" and telling them to "bite my butt"
DQQDr TIL Scientists Make Simulated Moondust, JSC-1 simulant, to use to test equipment intended for The Moon. It is very abrasive, which grinds machinery & seals, & damages human lungs.
OW11 TIL The Butterfly Effect isn’t meant to illustrate how small events may have far-reaching consequences - it’s about the limits of predictability, and how we can’t be absolutely certain of the outcomes of any calculations related to the weather.
j6QJQ TIL This Tiny Island has more kinds of ferns than the North America and Europe
8axJZ TIL W. E. B. Du Bois envisioned "an Encyclopedia Africana," named like the Encyclopædia Britannica. Du Bois envisioned a scientific and comprehensive work on Africa and Africans that would refute the Enlightenment notion of blacks as devoid of civilization. Due to lack of support, the project died