Perhaps such beam is not very useful technicallyor economically.Ultimately, we can do it by physics, he will have figured outhow to synthesize absolutely anything, so that this will really beuseless.. All this informationwhether we havebrown eyes, or whether we think at all, or that in the embryo thejawbone should first develop with little hole in the side so thatlater nerve can grow through itall this information is containedin very tiny fraction of the cell in the form of longchain DNAmolecules in which approximately atoms are used for one bit ofinformation about the cell.

If the faceis changed if am closer to the face if am further from the face ifthe light changesI recognize it anyway. What are thepossibilities of small but movable machines? They or notbe useful, but they surely would be fun to make. Consider any machinefor example, an automobileand askabout the problems of making an infinitesimal machine like it. Suppose, in the particular design of the automobile, we need acertain precision of the parts we need an accuracy, lets suppose, of410,000 of an inch.

They will undoubtedly finda better way when we do actually have it written, but to make mypoint conservatively shall just take techniques we know today.We would press the metal into plastic material and make mold ofit, then peel the plastic off very carefully, evaporate silica into theplastic to very thin film, then shadow it by evaporating gold atan angle against the silica so that all the little letters will appearclearly, dissolve the plastic away from the screen where the light is shining.

The head of pin is asixteenth of an inch widewhich is the barest piece of that can be made out by the humaneye.

And there isa device on the market, they tell me, by which you can do things at onequarter scale anywaythe little servo motors with little hands playwith little nuts and bolts they drill little holes they are four timessmaller. In computers we have to store anenormous amount of information. am not inventing antigravity,which is possible someday only if the laws are not what we think. In other words,one of those dots still would contain in its area 1,000 atoms. Perhaps you canfigure better way than that to down to small scale morerapidly.