To the short list that includes Jules Verne and H.G. Wells as founding fathers of science fiction, the name of the Belgian writer J.-H. Rosny Aine must be added. He was the first writer to conceive, and attempt to narrate, the workings of aliens and alternate life forms. His fascination with evolutionary scenarios, and long historical vistas, from first man to last man, are important precursors to the myriad cosmic epics of modern science fiction. Until now, his work has been virtually unknown and unavailable in the English-speaking world, but it is crucial for our understanding of the genre. Three wonderfully imaginative novellas are included in this volume. The Xipehuz is a prehistoric tale in which the human species battles strange geometric alien life forms. Another World is the story of a mysterious being who does not live in the same acoustic and temporal world as humans. The Death of the Earth is a scientifically uncompromising Last Man story. The book includes an insightful critical introduction that places Rosny's work within the context of evolutionary biology.