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TIL When aluminum was first discovered, in the early 1800s, it was worth more than gold. Originally, it was hard to separate from other materials. The Washington Monument was capped with it. When a reliable method was finally found to purify it, prices plummeted from $16 ($419 today) a pound to $2.

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69vWY TIL that during the summer of 2002, Mr. Rogers' chronic stomach pain became severe enough for him to see a doctor about it, and in October 2002, he was diagnosed with stomach cancer. He died four months later on February 27, 2003 at the age of 74.
6Eyw8 TIL that debian (a linux based Operating System - Parent of Ubuntu) has its versions named after toy story characters since its initial release in 1996 (code named Buzz after Buzz Lightyear)
N7WdJ TIL of Rosalind Franklin, a X-ray crystallographer whose discovery of the double-helix structure of DNA went uncredited for years is now beginning to finally get her due credit.
W7NAX TIL in Utah, you have to upload your ID and register your email address in order to watch Pornhub and other adult content sites on your personal devices.
b6DQE TIL that Cotton and Kahn on "King of the Hill" and The Wiz on "Seinfeld" were played by the same actor (Toby Huss)