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TIL that the Soviet Union successfully landed 10 probes on the surface of Venus between the years 1961 and 1984. In spite of the short life spans of the Venera landers due to the extreme surface conditions, several of the landers were still successful in transmitting imagery from the surface.

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QJEM9 TIL that after accounting for calories burned when pedalling, a person riding a bicycle has an equivalent energy use of 732 mpg. For comparison, electric cars only have around 100 mpg equivalent.
R7NV8 TIL of LeBron James' "Promise School" where at-risk students have 8 hour days, a longer school year and receive free meals, bikes, and tuition
VMKap TIL: In 2010 competitive swimming banned polyurethane suits in swimming that could reduce drag up to 8%, after records were broken in droves. The thin layer of fabric was made up of tiny bubbles that trapped air and actually made the swimmer float higher in the water.
awneA TIL sci-fi author Isaac Asimov refused the invitation to friend and famed A.I. pioneer Marvin Minsky’s lab at MIT in the 60s because he was “Writing about really intelligent robots of the future and was sure that if he came and saw the clumsy ones that we were making it would spoil his imagination.”
won91 TIL BBC developed a written form for West African Pidgin. Pidgin has 75 million speakers in West Africa but did not have a standard written form prior to this. E.g. ,"Wen be Eid al-Fitr and how dem dey decide di date?"