Physics Uncovered on Instagram: "Leonardo da Vinci’s self-supporting bridge is a simple but genius bridge design that doesn’t need nails, ropes, glue, or screws to stay together. Instead, the pieces of wood hold each other in place using only gravity, balance, and pressure. The design works by sliding wooden beams together so they lock at angles. Each beam pushes down on the one below it, which creates tension and stability. The more weight the bridge carries, the tighter the structure presses t