For Eugene Shoemaker, the Moon was a geologic gold-mine. Or rather, better than a gold mine, since that’s technically geology too. He fancied himself a scientific historian and just wanted to learn more about the Moon’s story. Like, how did it get all of those craters? Well, he decided the best way to find out would be to go there in person. Thus began a long and successful scientific career in which Gene basically invented astrogeology and planetary science. As for how he finally got to the Moon, that was a real surprise.