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4

TIL Brandolini’s law, also known as the bullshit asymmetry principle. The law states the amount of energy needed to refute bullshit is an order of magnitude bigger than that needed to produce it.

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rom4 TIL Yoshida Kogyo Kabushikikaisha (YKK) produces nearly 7 billion zippers a year. Their every stage of the zipper making process is in house i.e. from smelting their own brass and building the zipper-making machines to making the boxes they ship in.
KYDGa TIL: That fungi have a range of vital roles from helping plants draw water + nutrients from soil to medicines that can lower blood cholesterol or enable organ transplants. But they have a darker side: devastating trees, crops, other plants across the world and wiping out animals such as amphibians.
Oomx1 TIL: For a period of time, many old Hollywood movies used asbestos to replicate the look and feel of snow. Most famously, The Wizard of Oz, It's a Wonderful Life, and White Christmas.
N7Zo1 TIL The Star Wars (1977) attack run scene was heavily influenced by the Dam Busters (1955) bombing run (based on the true story of a low flying bombing run, deep in Axis territory, amidst enemy fire, with a very narrow target window to hit a weak point in enourmous enemy targets. Sound familiar?).
6dN7 TIL Hitler wrote a second book after Mein Kampf in 1928. In it he describes why he would go to war in Europe and how he admired US eugenics programs. It was never published because he feared it would hurt already-low Mien Kampf sales.