Born in Berlin in 1769, Alexander von Humboldt will leave for America accompanied by the French doctor and naturalist Aimé Goujau Bonpland. From June 1799 to August 1804, Alexander von Humboldt will traverse more than 10.000 km through North America, the Central America and of the South, will furrow particularly dangerous areas and will make known with the public of many discoveries ignored of Europeans. He begins several research on the geography, botany and climatology. Humboldt unloads in South America at the beginning of the XVIIe century. It describes the ruins of the old INCA empire and succeeds in measuring and identifying the cold marine current which skirts the South American coasts of the Pacific Ocean and which bears its name today. It proves that the American continent is older than imagines it the popular thought. It counts more than 400 volcanos; it counts an incredible number of species of plants and animals; then, he to the point denounces the atrocities made at the time of the colonization of the South American continent.