Before the rise of a self-conscious intelligentsia, most educated people – as well as the unlettered majority – spent most of their time in the countryside or, if they lived in cities, were a few blocks away from farmland or wilderness ... At the risk of sounding countercultural, I suspect that thinkers who live in sealed, air-conditioned boxes and work by artificial light (I am one) are as unnatural as apes in cages at zoos. Naturalists like Eiseley in that sense are the most normal human beings to be found among intellectuals, because they spend a lot of time outdoors and know the names of the plants and animals they see ... For all of his scientific erudition, Eiseley has a poetic, even cinematic, imagination.