History Facts & Stories on Instagram: "In 1939, inventor William E. Urschel created the world’s first 3 D printed building behind a small warehouse in Valparaiso, Indiana. The experimental structure was produced using a custom built mechanical system that continuously extruded layers of concrete to form walls directly on site, reducing the need for traditional formwork and manual labor. The following year he would file a series of patents for a Wall Building Machine, describing a method for auto

@solved_science on Instagram: "Motorizing a wheelbarrow shifts most of the load from human muscles to mechanical power, using torque from a small engine or electric motor to handle weight, slope resistance, and continuous movement. This reduces strain on the spine, arms, and knees while improving speed and control on uneven surfaces. This modification is done to prevent long-term injuries, increase daily productivity, and allow one worker to move heavy materials safely without exhaustion. #const

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