http://c5febborw3avzp5gobl6nvbbwflkjrfigqbm7z3i4czxu3bjrc5hsqad.onion/library/Fiction/Isaac%20Asimov%20-%20The%20Feeling%20Of%20Power.html
Still, the cave men must have had some method,
eh?" "Lost arts! If you're going to talk about lost arts - " "No, no. I'm not a lost art enthusiast, though I don't say
there may not be some. After all, man was eating grain before
hydroponics, and if the primitives ate grain, they must have grown
it in soil.