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TIL during Apollo 11 NASA suspected that the pressure from the exhaust of the LM engine being reflected by the lunar surface might make it explode, and Neil Armstrong was meant to shut it down as soon as the contact light went off, but he forgot.

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M5B7 TIL Humans are born with only two innate fears: the fear of falling and the fear of loud sounds. Every other fear is learned.
E1BwV TIL Ada Lovelace is called the world's first computer programmer; She wrote the world’s first machine algorithm for an early computing machine that existed only on paper.
pjRN TIL the bite in Apples logo was originally meant to hold the letter “a” in Apples old logo
7r6Kb TIL of the Seven Sutherland Sisters, who had a combined length of 37 ft of hair and traveled the world as a curiosity and to promote their hair growth products. They grew up in poverty, made millions, lived an extravagant and squandering lifestyle, and the last of them died destitute.
ggQb TIL women in Tajikistan consider unibrows beautiful. Women not blessed with hair between their eyebrows fake them with makeup.