In 1799, Alexander von Humboldt and Aimé Bonpland set out to determine whether the Orinoco River connected with the Amazon. But what started as a trip to inves

In my book Introduction to High Altitude Entomology, published in 1962, I summa rized the results of eight years' studies, mainly on the Himalaya. I have since

The Physical Geography of South America, the eighth volume in the Oxford Regional Environments series, presents an enduring statement on the physical and biogeo