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TIL the special effect in sci-fi movies of a 2D ring of energy or matter emanating from an explosion is called the 'Praxis Effect', named after the visual effect of the explosion of the planet Praxis in Star Trek VI. Other uses include the seismic charges in Star Wars Attack of the Clones.

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y1wp TIL of the Holodomor, mass-deaths resulting from man-made famine in Ukraine during 1932. The highest estimates of death tolls rival the Holocaust with anywhere from 3 to 12 million killed.
JR91 TIL that Tim Duncan of the San Antonio Spurs sacrificed money and stayed in college for four years instead of going directly to the NBA because in her last days, his dying mother made him promise to graduate college with a degree.
jNa7M TIL that angry people are significantly more likely to get heart attacks than the rest of us.
xVdAg TIL that the Seinfeld TV show finale was the first prime time, non-sports broadcast to command $1 million for a 30-second commercial spot, a price previously only attained by Super Bowl broadcasts.
9mJG TIL: USAF Project Thor (aka “Rods from God”) consisted of dropping telephone pole sized tungsten rods from space. This would provide global strike faster than an ICBM, be nearly impossible to defend against, and would hit the earth at Mach 10 causing the devastation of a tactical nuclear warhead.