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TIL during the “Tuskegee syphilis experiment” the US Public Health Services studied the natural progression of untreated syphilis despite the “cure” being widely available

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gnD8 TIL: NASA has found that under certain conditions the moon rings like a bell.
rRbK4 TIL that as Pres. Grover Cleveland and his wife were moving out of the White House, she told staff to take care of the place because "We are coming back four years from today." Cleveland won another term and moved back in four years later.
D1ng TIL that the Bible mentions powerful, sinful giants known as the “Nephilim”, who are the children of fallen angels and mortal women.
Egy4o TIL comedian Andy Kaufman was inducted into the WWE Hall of Fame last year.
LQrrP TIL 50yrs ago the Arecibo Message was sent into space to communicate human existence to potential extraterrestrial life.