Aeronautics, the science and practice of aircraft flight. (An aircraft is a vehicle that is supported in flight by its own buoyancy or by the action of air on its surfaces.) The term aeronautics takes in all phases of the design, construction, and operation of both lighter-than-air craft (airships and balloons) and heavier-than-air craft (such as airplanes, helicopters, convertiplanes, autogiros, gliders, and kites). The term aviation is usually restricted to powered, heavier-than-air craft.
A group of scientists from Duke University have demonstrated a simplified cloaking device. Learn about the cloaking device that the Duke scientists created and find out if a real-life cloaking device is actually possible.
Lead is one of the most maligned metals on the periodic table and for good reason. Lead poisoning is serious. But the beleaguered element isn't all bad, especially when it's protecting you from radiation.