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TIL a solar storm like the Carrington Event in 1859 would cause devastation to world electronics if it happened today.

Read more news.nationalgeographic.com

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kOpA5 TIL that “moonbows” are a natural phenomenon that occurs when (1) the moon is close to full, (2) rain is falling opposite the moon, and (3) the moon is low. Since the moon is the only source of light, the lunar rainbow will appear monochromatic to the naked eye. (More links in comments)
YpEjB TIL Child labor in the United States was largely ended by a photographer named Lewis Wickes Hine. He took child laborers photos at eye level to humanize and personalize each child. He captured nearly identical pictures across the country to show lawmakers this was a systemic problem.
KO1W9 TIL: The Hula burger. In 1962, Ray Kroc added a grilled piece of pineapple with a slice of cheese in a bun as a meatless option for Catholics on Lent. Needless to say, it didn’t last very long
yVnKl TIL the most expensive commercial of all time is "Chanel No. 5 the Film" which was released in 2004 and cost $33 million (around $52 million adjusted for inflation). The 3-minute ad starred Nicole Kidman and was directed by Baz Luhrmann.
OoRk6 TIL that since 2016, the real bones of nazist Josef Mengele, the nazist Angel of Death, are used in a brazilian school to teach medical forensics.