Now, you will ask me what in the world we went up on the Moon for; I'll explain it to you. We went to collect the milk, with a big spoon and a bucket. Moon-milk was very thick, like a kind of cream cheese. it formed in the crevices between one scale and the next, through the fermentation of various bodies and substances of terrestrial origin which had flown up from the prairies and forests and lakes, as the Moon sailed over them.
-Italo Calvino, The Distance of the Moon