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TIL Lego designed the holes in minifigure heads to allow kids to keep breathing if they become stuck in their throat

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rRx84 TIL UK's national anthem changes from"God save the Queen" to "God save the King" depending on the gender of the reigning monarch
KygB TIL that the Australian military has never fought a human opponent on Australian soil.
b6ENa TIL that typical cloud weighs around a million tonnes, has a volume of around 1km3 and a density of around 1.003kg per m3.
oBd8E TIL Of the pareto principle also known as the 80/20 rule. Which states that for many events, roughly 80% of the effects come from 20% of the causes. ex. Microsoft has noted that by fixing the top 20% of the most-reported bugs, 80% of the related errors in a given system would be eliminated.
7QZ7 TIL Kevin Hines who jumped from the Golden Gate bridge survived because, as he fell toward the water, decided that he wanted to live after all, and positioned himself so he hit the water feet first. He suffered serious injuries but was kept afloat by a black seal swimming below.