Never heard of Alexander von Humboldt? Don't miss the opportunity to tell your class about "the most important forgotten man of science." The narrator describes an array of Humboldt's scientific accomplishments in his five-year journey through South Africa, such as his detailed drawings of Inca ruins, discovery of new species, recordings of air pressure at the highest altitude by that time, etc. He is considered the founder of biogeography and the theory of the unity of nature, which plays a vital role in modern efforts to protect our habitat.