Chapter 3 examines how transatlantic fiction about dinosaurs shaped notions of national potency at a key moment in US and British history. The first half focuses on two American interstellar romances whose violent protagonists vanquish dinosaurs on evolutionarily backward planets. J. J. Astor’s A Journey in Other Worlds (1894) has them conquering Jupiter’s dinosaurs before heading to a Christianised Saturn and learning about the ‘Anglo-Saxon’ race’s spiritual evolution, while in Gustavus Pope’s Journey to Venus (1895) they subdue prehistoric Venus in an unruly pastiche of palaeontological writing. The chapter’s second half provides alternative perspectives from British authors whose narratives, all published in 1899, allude to the ongoing search for giant dinosaurs in the American West as a way of reflecting on nation, empire, and masculinity. Henry Hering’s short story ‘Silas P. Cornu’s Divining-Rod’ ridicules the avarice of the US tycoons who fuelled the dinosaur ‘rush’, while C. J. Cutcliffe Hyne’s The Lost Continent and Frank Savile’s Beyond the Great South Wall have encounters with giant brontosaurs reinvigorating men’s imperialistic masculinity in over-civilised societies.