Science fiction and surrealism are two of the most influential modalities of fantasy in modern art and thought. But science fiction is by definition fantasy grounded in rationality, whereas the surrealists attacked the claims of rationality, or sought alternatives that would bypass reason altogether. So, how is it that artists often work to combine the two modes? I'll explore some forms of SF art, chiefly visual representations, which seem to call into question the hard distinctions between the styles, and between the world views that animate them.