What do math variables, x-rays, Malcomb X, and the X-Files all have in common? They all use X to represent an unknown.
X-rays-- Roentgen didn't know what he had, so he called them x-rays.
Malcomb X-- calls himself that for all of his unknown ancestors from Africa.
X Files--They worked on strange cases with unknown origins.
Going with this idea, my next two posts are Y is for x, and Z is for x. :)
