Science fiction is famously difficult to define. In 1952, the writer and editor Damon Knight famously wrote that "science fiction is what we point to when we say it." But what if what we point to is just the surface, just an aesthetic, and what really matters is what is underneath?

This episode is a brief exploration of what I see as the important gap between two linked, but different things: the living, breathing genre of SF, and the host of images that it has spawned and carried with it through the years - its aesthetic.

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