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TIL the loudest human voice belongs to Annalisa Flanagan, a primary school teacher with the ability to shout the word "Quiet!" at 121.7 dB

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woPmP TIL of Zambia's space program involving being rolled down a hill & spun around trees in an oil drum as weightlessness training, then swinging on a rope then cut from it, emulating freefall. Taught to walk on their hands as this was "how you walk in space". A 16 yr old and a cat were Mars bound first
1gb4 Til sperm from sexual intercourse in comparison to masturbation is 120% more sperm, of greater volume, and higher quality.
aOeZ TIL the Shakers, a religious sect that once numbered over six thousand, died off because one of their central tenants is celibacy.
0wvj1 TIL that being a NASCAR pit crew member is so physically demanding that today instead of giving mechanics physical training, they take athletes and give them auto mechanic training
4L46 TIL that Dr Catherine Hamlin and her husband answered an ad in 1958 for an obstetrician and gynaecologist to set up a midwifery school in Ethiopia. She still works there today at the age of 89. Happy International Women’s Day!