There are several inventions and discoveries that were made in earlier years but due to some reason these were still lying so as to not to fully useful. Now engineers are working to make body parts that will work very efficiently like retina, arms and legs. These parts will need no wiring connections and main thing is they are to be controlled by brain itself. Robot like machine is under process that will carry the heavy loads for man. The technique and science are moving at a pace that cannot be even understood or believed. These things exist but yet to develop in successful results.