The horse was domesticated 4,200 years ago in the steppes of the North Caucasus. It was neither more nor less than a revolution announcing a new era: that of speed. From then on, “the world itself seemed smaller than ever”. LO From cave horses to racetrack champions, Ludovic Orlando tells us the story of the horse and the long friendship that we have maintained with him. His book is a fascinating genealogical investigation, combining advanced genomics, archaeology, history of peoples, languages and migrations. Whether they are Botai or Przewalski horses, English or Arab thoroughbreds, mules or mules, medieval steeds or even Viking and Genghis Khan mounts, with genetics, we now know what they looked like and where they came from. were coming. DNA certainly solves enigmas, but it also raises new questions: thanks to it, Ludovic Orlando offers us an extraordinary journey through space and time, clinging to the manes – and fossils – of splendid animals that make dream.