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TIL The French Navy uses 30:33:37 proportions for its tricolour ensign. When flying in a breeze the fly (right) side appears relatively smaller and the hoist (left) side larger, and the asymmetry is an attempt to correct for this effect.

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JYnv1 TIL the longest filibuster in US history (a process of delaying a bill passing by speaking in the Senate until you want to stop) was over 24 hours (24 hours and 18 minutes). This was an attempt to delay The Civil Rights Act of 1957.
E1bOo TIL the NAACP for eighteen years flew a huge flag over its New York headquarters stating, “A Man Was Lynched Yesterday.” In the wake of the lynching of Jesse Washington.
nElW TIL Tinder, OKCupid and Match.com are owned by the same company, InterActiveCorp, who also own CollegeHumor, Vimeo, and 50 other internet websites
R746a TIL about Graham's number. This is a finite number so large that you couldn't write it out even if the numbers you used were subatomic in size and you used the whole observable universe as a canvas. But we know it ends in a seven.
Mev5W TIL that rainbows have cousins. Fogbows appear when water droplets suspended in the air are so small that the diffraction of light is negligible, hence appearing white. It also causes the arc to be steeper. They’re sometimes known as ghost rainbows or white rainbows.