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Explore l Learn l Facts on Instagram: "He built a screw tank that can drive through deep mud by using rotating helical cylinders instead of wheels or tracks, allowing the vehicle to pull itself forward where normal machines would sink. As the screws spin, they bite into soft ground and push material backward, creating thrust and keeping the vehicle afloat on mud, snow, or swamps. This unusual design spreads weight evenly and turns unstable terrain into a usable surface, proving that smart engine