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Vehicles 🚗
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The first cars didn't have keys — you had to crank them to start!
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Airplanes fly by pushing air down, which pushes the plane up.
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Some trains are so long they have more than 100 cars connected together!
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Submarines dive underwater by filling special tanks with water.
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Rockets need to go super fast — about 40,000 km/h — to leave Earth!
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Bicycles are one of the most efficient vehicles — powered just by you!
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