The fact is that robots are not always physical. The ghost robots can be the computer algorithms that are used for searching data from the network. And the ghost robots can be used by the physical robot. The physical robot just connects itself to the network. Then the physical robot sends its algorithms to the system to collect the data from the net. 1) The core of the robots are the servo-engines and other things that the physical robots use for interacting with their environment. Robots can use many things, that are not safe for humans. They can use jetpacks for flying and that kind of system can give them the modular operating capacity. The robots can use parachutes. They can jump from aircraft or operate in space very long time without cancer risk. The gloves of robots might have welding tools like laser and electron welding systems. Those systems can use to fix the holes on the walls of space stations but they can also be weapons. The same electron and laser rays that are me