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TIL - To demonstrate the sharpness of stone tools, Archaeologist Dr. Adrien Hannus elected to have major surgery done with obsidian blades rather than surgical steel scalpels. Obsidian is the sharpest substance known to mankind.

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6LeZ TIL General Order No. 11 (1862) was an order issued by Ulysses S. Grant ordering the expulsion of Jews in his district, comprising areas of TN, MS, and KY as part of a campaign against a black market in Southern cotton, which he thought was being run “mostly by Jews and other unprincipled traders.”
4Y6o TIL that the Wachowskis asked Warner Bros. for $80 million to make The Matrix but only got $10 million approved, so they decided to spend all of that money on the opening sequence. They showed it to the Warner executives who were so impressed that they gave them their original budget.
ANXVn TIL the Florida 321 area code was selected for Brevard County & Cape Canaveral due to its resemblance to a space craft count down launch sequence (3...2...1...liftoff).
8NYK TIL velociraptors measured 1.6ft high at the hip, and weighed up to around 33lb
mQWv TIL of Casey Jones, a railroad engineer who died in a train crash. Having realised a collision would occur, Case ordered his colleague off the train and remained in control of the engine to minimize impact. This saved the lives of all passengers except himself