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TIL that Chekov did not appear on ‘Star Trek’ until the first episode of the second season. The character was created to attract young viewers by resembling Davy Jones of The Monkees.

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OYae TIL Bayer produces harmful chemicals which may be a huge factor in Colon Collapse Disorder in bees.
8e6NX TIL about the Great Smog of London that lasted for 5 days and killed 10,000 people.
Z8eVB TIL in 1990, Dr. Mary-Claire King discovered the human gene BRCA1 which is linked to breast cancer. Soon after, Myriad Genetics cloned and patented it. She was sent a cease-and-desist letter to stop researching it. Finally in 2013, the US Supreme Court ruled that human genes cannot be patented.
Y76dG TIL Engineer Amos Neyhart originated driver education programs in the United States by starting to teach students how to drive in 1933. A drunk driver hit his parked car in 1931 and he believed that the frequency of traffic accidents was due, in part, to the lack of driver training
Mm4a TIL ~70% of Cocaine in the U.S. is cut with Levamisole, a toxic Chemo drug used to treat certain invasive cancers, because it looks like cocaine, maintains its consistency, acts as a stimulant, and even passes street purity tests. It lowers the body’s WBCs & Immune System, even in occasional users