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TIL On Thanksgiving Day 1900 in San Francisco, a large crowd decided to watch a college football game from the roof of a nearby glass factory. The roof collapsed, causing people to fall four stories onto a furnace. 23 people died, and it remains the deadliest accident at a U.S. sporting event.

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QJrJp TIL about Hemicorporectomy. The amputation of the entire lower body, including the pelvis, the genitals, the anus, the urinary system and rectum.
e0XRk TIL about A-230, a new Russian chemical considered to be the most potent nerve agent ever discovered. It’s estimated that less than 0.1 mg is lethal for humans. It was added to Schedule 1 of the Annex of Chemicals of the Chemical Weapons Convention as of June 2020.
x6Z7 TIL Just after WWII, multiple short wave radio stations located around the world appeared. These stations transmit letters and numbers, presumably to spies and still operate today.
4WlJ TIL An alchemist, testing if urine can be turned to gold, discovered that urine instead yields phosphorus. Which was worth more at that time.
aldb TIL Kal Penn (Kumar from Harold & Kumar) who currently plays the White House Press Secretary on Designated Survivor was the actual Associate Director in the White House Office of Public Engagement.