Einstein, Newton, and Pascal are playing a game of hide and seek.

Einstein starts counting: “One, two, three…”

Pascal runs off and hides behind a large bush.

Newton, however, just stands there. He takes out a piece of chalk, draws a square on the ground exactly one metre by one metre, and stands inside it.

Einstein opens his eyes. “Newton — I’ve found you!”

Newton: “No, you haven’t. You’ve found one Newton per square metre. You’ve found Pascal.”