Les canyons du ColoradoJohn Wesley Powell1999

L'histoire de la première exploration des canyons du Colorado, en 1869, par John Wesley Powell et ses compagnons, constitue une des plus fascinantes et dangereuses aventures menées par l'homme dans sa conquête du territoire américain.
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Join John Wesley Powell's expedition to explore one of the 7 Wonders of the Natural World, and one of the last unmapped portions of the continental United States. Powell's detailed descriptions of the rocks, plants, and animals seen in the canyon, the geography of the area, and his team's interactions with native groups of the area and mishaps along the trail allow readers to feel the thrill, the awe, and the humility of standing on the canyon's edge.

Titre original : The Grand Canyon Expedition : The Exploration of the Colorado River and Its Canyons (1875)