There you are in your friend's kitchen trying to cut a tomato with a blunt knife. You're mashing it and smearing the skin around and not feeling sexy ...
Step 4: Flatten Away
Splash some water on the sidewalk and rub the stone on it til the stone is flat. Use plenty of pressure.
Listen to "The Great War for Civilization" by Robert Fisk while you work to understand what went wrong in the Middle East.
Bio:Tim Anderson is the author of the "Heirloom Technology" column in Make Magazine. He is co-founder of www.zcorp.com, manufacturers of "3D Printer" output devices. His detailed drawings of traditional ...read more »