Ray Bradbury reading a poem, "If only we had taller been," at JPL in 1971, just as Mariner 1 was about to go into orbit around Mars. Here's the text, which was published in a collection of Bradbury's poems, When Elephants Last in the Dooryard Bloomed, in 1973. [via boingboing]
UPDATE: A reader, Sara, noticed differences between the version of the poem Bradbury read in 1971, and the one he published in 1974. Sure enough, there are a few additional lines, and a tweaked word or two. Interesting.