The History Source on Instagram: "3d printing might be one of the more trendy technologies of recent years but the concept goes back much longer. In the 1930s an inventor named William Urshel developed a machine to essentially print building materials. Seen here in this 1939, Urshel built a small warehouse in Indiana, to demonstrate his device, and would file patents for what was called a “wall building machine.” Urshel would go on to invent a number of other items and his company Urshel Laborat

Wealth on Instagram: "This inventor in China turned a legendary weapon into a fully controllable flying machine powered only by hand gestures. ⚔️🤖 He engineered a custom drone core, built a lightweight sword frame around it, and programmed a motion-recognition system that tracks the movement of his hands in real time. The drone translates each gesture into precise directional commands, letting the sword hover, glide, pivot, and climb with smooth aerial control. The design blends aerodynamics, e