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TIL scientists have been able to genetically modify mosquitoes so their sperm can only produce male offspring, decimating test populations in six generations. This inexpensive innovation could prevent the spread of malaria, save millions of lives and won’t have a significant impact on the ecosystem.

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PvlG TIL in 1997, a student won first prize when 43 out of 50 of his classmates (86%) voted to ban the chemical dihydrogen monoxide because it caused “excessive sweating & urination,” among other effects. His project showed misleading terms can lead to false conclusions among the public.
lvdB TIL the doctor who ran the famous gender identity study on identical twin boys where one was raised as a girl falsified his data for 30 years, and that the boy never actually accepted his female identity
l7XYr TIL about Brachycephalus, the world's smallest vertebrate, a frog so small it could sit on the head of a pencil eraser. Their auditory systems have also shrunk: at least two species can't hear their own mating calls.
PyAn TIL Mitch Hedberg wrote, directed and starred in the 1999 film “Los Enchiladas!”, also starring Dave Attell and Marc Maron. It premiered at Sundance, but was never released publicly. Here it is!
LK8r TIL that the Soviet Secret Police on Stalin’s orders executed 22,000 Polish officers but Roosevelt and Churchill had to deny it and blame the Nazis in order to maintain their alliance with Stalin