The fossil Archaeopteryx forever changed our understanding of dinosaurs and the origin of birds, but it took a century after its discovery and a one-page paper to shift scientific consensus. Here’s the story of that landmark 1973 article by American paleontologist John Ostrom, and published in the journal Nature, describing the bird-like features of Archaeopteryx and convincingly arguing that birds were descended from a group of dinosaurs called theropods. Host Charlotte Stoddart speaks with paleontologist Julia Clarke of the University of Texas at Austin, whose own research focuses on the early evolution of birds and the origin of flight. Find the transcript and additional resources at knowablemagazine.org/podcast.