They start out as small, microscopic nests of cells that can only grow to one half a cubic millimeter in size that's the tip of a ballpoint pen.

You may have heard about the Kryptonite lock brouhaha, where a blogger talked about how you hack, or break into, a Kryptonite lock using a ballpoint pen, and it spread all over. Kryptonite had to adjust the lock, and they had to address it to avoid too many customer concerns.