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TIL The Hubble Telescope is using Spermaceti (whale oil) to lubricate its parts due to whale oil's capacity to withstand extremely cold temperatures without coagulation.

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JYWXB TIL Ginggaew Lorsoungnern, a Thai convict executed by firing squad, was discovered to have a rare condition called Situs Inversus (internal organs reversed) after she was shot in the left side of her chest and survived. After waking up in the morgue she was taken back and executed.
YdQr TIL of an evolutionary rock-paper-scissors mechanism. Three variants of the Common Side-Blotched Lizard compete for mates; Orange males are adapted to steal mates from Blue males, who are adapted to steal mates from Yellow males, who in turn are adapted to steal mates from Orange males.
w07o TIL of the Green children of Woolpit; a brother and sister with green skin who appeared by an English village and spoke in an unknown language.
nJP9 TIL Scrubs is based of a real life JDs’ (named Dr. Jonathan Doris) experiences as a resident. His name and those of the other medical advisors form a basis for JD’s, Turk’s and Molly Clock’s names in the show.
kJn7E TIL that reindeer are actually a real animal, not just magical deer from christmas fairytales.