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TIL People had known about planet Mercury since ancient times, but Samuel Schwabe wanted to see if there were any other planets even closer to the Sun than Mercury. He tried his best to discover a new planet between 1826 and 1843 but noticed sunspot cycles instead

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dwgQ TIL black children adopted by white parents have average IQ scores 13.5 points higher than black children adopted by black parents
xEEB TIL a man shot and kill his son’s kidnapper on camera and was only given 5 months probation. (video)
9YDyp TIL professors of universities during the Vietnam War inflated students' grades in order to help them avoid the draft.
e0QQ5 TIL that a Venice-like city in present-day Micronesia was built in the 8th or 9th century and abandoned by the 17th century.
VBMZ0 TIL in 1978, a small Cessna 178 became lost over the Pacific Ocean after its navigation systems failed and was rescued by an Air New Zealand DC-10 performing an impromptu search for it.