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TIL Sub-Saharan Africans were the first people to smelt iron

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DQEnv TIL that pendrives found on the street may not only have malwares (software threats) but could also be disguised USB killers (hardware threats).
aZKL TIL that humans can generally detect their parents, children, and siblings (but not spouses, half-siblings, and stepchildren/step-parents) by smell, and females prefer sexual partners with a different smell than their own. Scientists believe this is an evolved defense against incest.
698LZ TIL about Tarrare, a French spy and Performer who had such an appetite he would eat live cats and puppies, cadavers from morgues and was even suspected of kidnapping and eating a baby. He would also eat from heaps of dung in the street and as a spy, the entire army's rations.
dDXD7 TIL The United States is closer to the Netherlands than Brazil
KOQv4 TIL The Trafalgar Square Christmas tree is a Christmas tree donated to the people of Britain by the city of Oslo, Norway each year since 1947 as a token of gratitude for British support to Norway during WWII.