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TIL Rare Earth Elements are actually fairly abundant. The rarest of REEs (thulium) is still 125 times more prevalent in the earth's crust than gold - and the most prolific REE (cerium) is 15,000 times more abundant. The name really refers to difficulty of finding large deposits or seams.

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EL5P TIL that in the midst of a three-year killing spree, over which he is believed to have murdered up to 130 people, serial killer Rodney Alcala was featured a contestant on The Dating Game, and was picked by the bachelorette. She never followed up on the date because she found him “creepy”.
NapP TIL a British soldier managed to get a longbow kill during WW2, the only recorded one during the war as well as the most recent one.
NRYe TIL Panspermia is the hypothesis that life exists throughout the Universe, distributed by meteoroids, asteroids, spacecraft etc. in form of extremophile types of bacteria. If met with ideal conditions on a new planet’s surfaces, the organisms become active and the process of evolution begins.
1a5pV TIL just 12 days before he died of a drug overdose, Mitch Hedberg went on the Howard Stern show and said, 'I got the drugs under control now,' and that he only used them for the 'creative side of it'.
v1AG7 TIL about Sarah Knauss, who was the oldest verified American ever, dying at age 119 on December 30, 1999. Her age was verified with the help of an 1891 US Census directory, a 1900 US Census entry, a 1901 marriage certificate, and both 1910 and 1930 US Census entries. All of these confirm her age.