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Today I Learned that simply washing your lenses with soapy water prevents them from fogging when you wear a facemask and that this is a common technique used by surgeons and others in the operating theatre.

Read more ncbi.nlm.nih.gov

via reddit.com

loKP5 TIL that, one of the few references that Leonardo Da Vinci made to sexuality in his notebooks states: "The act of procreation and anything that has any relation to it is so disgusting that human beings would soon die out if there were no pretty faces and sensuous dispositions."
Z8EAQ TIL, bleach mixed with water is only potent for about one day
wL051 TIL, that it was the Coptic Christian priests who castrated boys to become eunuchs to serve in a sultan's harem. It was against Islamic law to castrate men.
aVDJ TIL the word “slave” is derived from “Slav” since many Slavs were commonly enslaved in the early Middle Ages
LoRP TIL a man in Nebraska is breeding red cows and sending them to Israel in hopes of a pure red heifer being born there; such an event will allegedly prompt Jews to build a Third Temple, which fundamentalist Christians believe will usher in Jesus’ Second Coming.