Robotic Quadcopters Build a Tower Autonomously

A swarm of autonomous, mini-helicopters have built a toy tower, demonstrating that machines could one day build structures without humans present. This could keep humans out of dangerous areas, such as when building super tall skyscrapers or even construction buildings in war zones.

Wave Disk Generator : Engine that requires no transmission, crankshaft, pistons, valves, fuel compression, cooling systems or fluids.

The engine has a rotor that's equipped with wave-like channels that trap and mix oxygen and fuel as the rotor spins. These central inlets are blocked off, building pressure within the chamber, causing a shock wave that ignites the compressed air and fuel to transmit energy.
The Wave Disk Generator uses 60 percent of its fuel for propulsion; standard car engines use just 15 percent. As a result, the generator is 3.5 times more fuel efficient than typical combustion engines.
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