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TIL Basic oxygen steelmaking was invented by just one man; the Swiss engineer Robert Durrer in 1948. Durrer's technique accounts for 60% of all steel production as of 2000. additionally, since 1920 the labor requirements to produce steel have decreased by a factor of 1,000.

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vPV07 TIL the Landkreuzer P. 1000 Ratte was approved by Hitler to be the largest tank ever built, it would have weighed over 1000 tonnes and would have destroyed bridges due to it's weight alone
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