water tower five

"Suppose you take a piece of anything and cut it in half, using the thinnest and sharpest razor blade you can find.
"Then you cut that in half, then cut that in half, and so on, over and over again.
"Do the pieces get so small that they can't get any smaller? How thin is the edge of a razor blade? How small is the sharp end of a needle?
What are the smallest bits that things are made of?"

Richard Dawkins