One of the great aspects of 3D printing is how it has democratized manufacturing. Anyone with access to a 3D printer, raw materials like polymers, and a little imagination, can make almost anything.
One of the more vexing problems in modern construction is how to make buildings more earthquake proof. Since more construction is taking place around the Pacific Rim, where earthquakes tend to take place, finding answers has become vital.
The problem of space junk has proven increasingly vexing to both national space agencies, such as NASA, and commercial space companies. Millions of pieces of debris, ranging from nuts and bolts to spent satellites, orbit the Earth at thousands of miles an hour, providing a navigational hazard to both crewed spacecraft and active satellites. Periodically the International Space Station is obliged to maneuver to avoid a collision with a piece of space junk that might otherwise severely damage it.