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TIL about lake Hillier, which is known for its vibrant pink color. It is due to the presence of the algae Dunaliella salina. It causes the lake's salt content to create a red dye, which helps produce its pink color.

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9YPBr TIL The Vatican, Yale University, and many libraries have had requests sent to reserve the book, The Necronomicon, a fictional book invented by H.P. Lovecraft.
R7Rx8 TIL the "artificial banana" flavor is based on a real kind of banana called the Gros Michel. It was actually the predominant commercial banana available in the US prior to the 1950s, until a plague mostly wiped them out and they were replaced with the Cavendish banana we have today.
E1jwV TIL that millisecond pulsars are stars that complete at least one full rotation in less than 10 milliseconds. The fastest spinning pulsar rotates 716 times per second, and is as consistent in its rotation as an atomic clock when measured across decades
rNEpd TIL 1978, when Atari's then-corporate parent, Warner Communications,refused to open additional locations, they sold the rights of Chuck E. Cheese to Atari Co-founder, Nolan Bushnell for $500,000. He was later joined by Atari's other Co-Founder, Gene Landrum, who came onboard as their CEO.
X0Adj TIL that writer Tommy Blacha (Metalocalypse, Late Night With Conan O'Brien) worked as creative director of WWE in 1999.