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TIL high testosterone can result in a weakened immune system. This is why men usually are hit harder by colds than women

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dDY17 TIL - Domino's Pizza has a Wedding Registry
GYYVE TIL blowing into a vagina can cause a potentially fatal air embolism
7Lyx TIL of Robert Peace, a ‘black guy from the hood’ who ended up graduating from Yale with honors in molecular biophysics and biochemistry, moving back to his 'hood’ and teaching biology at his old highschool, engineering his own strain of Marijuana and getting killed over a drug deal
yQEOv TIL Jack the Giant-killer, Beanstalk-climber, of Lanterns and Frost fame, and often paired with Jill, is in fact an Archetypal Hero/Stock Character in Cornish and English folklore, and is believed to be the same person.
LQQoV TIL that Kim Il-Sung's parents were devote Christians. Father was part-time Protestant Missionary and Mother was presbyterian. Mother's name, Pan-Sok, is derived from Saint Peter. They married by arrangements of American missionary L. Nelson Bell, the father-in-law of Billy Graham.