John Gore was an Irish astronomer and science popularizer who, like Richard Proctor, at the end of the nineteenth century argued in favor of the universality of planetary systems on the grounds that stars without planets would serve no purpose. H. G. Wells, in his review of Gore's The Worlds of Space,¹ under the title "The Living Things That May Be", criticized the author for failing to speculate widely enough on the possible forms that extraterrestrials might take and suggested the possibility of silicon-based life.