This is a great concept: the cover of issue 8 of Opium Magazine has a nine-word story printed to become visible one word at a time over the next thousand years:  The cover of issue 8 is printed in a double layer of black ink. The overlayer is screened back for the nine words making the letters fractionally more vulnerable to ultraviolet light. The quantity of ink for each word is different, so the words will appear one at a time, when exposed to sunlight, over the next thousand years.  (via dailymeh)