Physics Uncovered on Instagram: "This is how China builds bridges so fast—using giant segment-launching machines that lift, move, and place massive concrete sections with amazing precision. Instead of constructing the entire bridge from the ground up, these machines advance along the already-built parts, grab pre-made segments, position them perfectly, and lock them into place in minutes. This approach saves time, cuts down on manpower, and keeps construction safe—even over rivers, highways, or