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Look at it. Really look at it. That object crossing the sky weighs more than five hundred metric tons. It burns four liters of fuel every single second. It is moving at close to six hundred miles per hour, six miles above the ground. And the people inside are asleep under blankets. Nothing in your understanding of the physical world should allow that. Heavy things fall. That is the rule. And yet the sky is full of these machines, every hour of every day, operating with such routine precision tha