Isaac Newton, Blaise Pascal, André Ampere, and James Joule are playing hide and seek.

Joule starts counting down from 100. The other scientists find hiding places, but Newton can’t find anywhere to hide. So he draws a square on the ground (1 meter on each side) and stands in the middle.

Joule finishes the count, opens his eyes, and sees Newton. He yells “Aha, i see you, Newton!” to which Newton replies “No, you found a Newton over one square meter, which means you found Pascal…”