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TIL that in the winters, brown bears produce less amounts of a protein called HSP47 to prevent them from developing blood clots during hibernation.

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16JXr TIL That in 1774 James Cook charted Sandy Island off the coast of New Caledonia. Despite its' inclusion in official maps and charts for over two centuries in 2012 an Australian survey vessel proved the island had never actually existed and may have been a 'pumice raft' floating in the area.
epPwD TIL there is an inmate on Texas’ Death Row called William George Davis. He was a former nurse, who was sentenced for killing 4 people by injecting air into their arterial systems. He supposedly did this to extend the patients time in the ICU letting him earn more overtime pay.
J15B TIL that a Soviet NKVD executioner personally killed 7000 Polish officers over a 28 day period with a pistol, working 10 hours per night and averaging a person every three minutes. He personally accounted for almost one third of the Katyn Massacre.
loZja TIL about the Sacred Band of Thebes, an elite group of Theban Greek warriors composed of 150 couples of male lovers.
0wWgM TIL Emma Watson used to mouth Rupert Grint's and Daniel Radcliffe's lines during the filming of Harry Potter and the Philosopher Stone.