
In an experiment aimed at determining qualitatively how much ink is inside a sharpie, the How Much is Inside people spent two days labelling CDRs with a single Sharpie. The answer:
The total was 968 CDs labeled with one Sharpie marker. You can view tiny images of the CDs on the gallery page.
I estimate the total distance marked to be 1,800 feet.
(via Ambiguous)