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TIL two tools aboard both the Spirit and Opportunity rovers, designed to grind rocks for examination, are made of recycled aluminum from the World Trade Center, recovered after 9/11. Honeybee Robotics, whom constructed the tools, were located in Lower Manhattan, just a mile away from ground zero.

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VM7PD TIL about "water sandwiches," a Great Depression food consisting of bread soaked in lard and water. It was sometimes served with "bulldog gravy," a mixture of milk, flour, and grease.
pYjZ TIL that there was a Princess warrior that refused to marry any man unless he was to first defeat her in a wrestling match. If the man lost, he must give her 100 horses. The Princess gained 10,000 horses and never married.
y0kl TIL that first widely spread computer virus, “Brain” was not malicious. It was made by two brothers from Pakistan, and even included their phone and address in the code so people could let them know they got it.
EpKV TIL AIDS denialist Christine Maggiore who refused to treat her own HIV or take any drugs that would prevent her from passing HIV to her daughter through pregnancy or breastfeeding died of AIDS…. 3.5 years after her daughter died… of AIDS.
meQY TIL An invasion of Canada that would have likely handed control of the Niagara peninsula to the USA was thwarted when one woman overheard the plans, walked 20 miles through wilderness, and warned a British Lieutenant. The invading Americans were ambushed and promptly surrendered.