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In a vacuum, fins can't steer a rocket. A gimbaled engine swivels its nozzle so the exhaust pushes at an angle, tilting the vehicle.
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The lunar rover’s tires were woven from metal mesh, not filled with air. The open weave flexed over rocks without the weight or puncture risk of ordinary…
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Harrods department store in London installed England's first moving staircase in 1898, designed by Jesse W. Reno as an inclined conveyor belt made of woven…
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A double-decker stacks passengers vertically, carrying more people without taking up more road width. It is the city bus equivalent of building another floor…
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A train needs room to clear the platform as it moves, and curves make that clearance trickier because the car body swings outward. The gap is the space that…
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The nose-shaped fairing shields a rocket’s payload from thick air, vibration, and heat during launch. Once the rocket climbs above the atmosphere, two halves…
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NASA spent nearly thirty-eight million dollars developing the Apollo Lunar Roving Vehicle in the early 1970s, creating a foldable, battery-powered buggy that…
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