"A picture is worth a thousand words" expresses some kind of average, combining the impact of many useless pictures with that of a few truly memorable ones. The picture of the beautiful, complex, and inviting Earth setting over the scarred, barren, and bleak lunar landscape may be worth more words than any other picture ever obtained. It dramatized the uniqueness of our planet, and its fragile environment, in a way that invigorated movements to protect it as no other picture would have been able to do.