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TIL that during WWI, officials didn't trust units of the D.C. National Guard to secure infrastructure around the capital because so many of their men had foreign ties.The job was given to the only unit they felt they could trust as 100% American: the all-black 1st Separate Infantry.

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9Yp9m TIL That Matt LeBlanc Dislocated his Shoulder during the filming of an episode of Friends, where the audience was made up of Pepsi contest winners. The set was shut down meaning Warner Brothers had to fly the winners home and then back out for another episode.
Bo5b TIL that the football huddle was invented at Gallaudet University, an all-deaf school, to prevent opposing teams from seeing their signs.
0d4op TIL that invasive ants can destroy entire ecosystems, specially ones that have symbiotic relationships between trees and ants. The invasive species of ants can kill off the native ones, and the plants are left to fend for themselves -- leading to the destruction of an entire ecosystem.
nWgor TIL that The Simpsons Movie was banned in Myanmar because the ruling junta had prohibited the colours red and yellow from appearing in any imported films. The colours were associated with the flag of the National League for Democracy, a rebel group pushing for democracy.
EgE80 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.