Did you know that complex behavior and intelligence developed on two very different evolutionary branches? In a fascinating book, Peter Godfrey-Smith* writes that the closest we will come to meeting an intelligent alien is an octopus.
The ancient Andeans revered shiny gold -- but there are dark sides to gold also. During my first trip to Peru I was chagrined to see numerious illegal gold mining operations. I recently found good articles discussing some of the associated environmental problems on a website written by Barbara Fraser (http://barbara-fraser.com/ ).
The Qhapaq Ñan, or Great Inca Road, that united the Inca Empire in the Andes Mountains was a tremendous engineering achievement. The Incan road designers took advantage of many pre-existing roads and trails. They expanded [...]
When I hiked to Machu Picchu along trails built by the Incas in the Andes Mountains, I was traveling on what was once part of the largest monumental system ever built in the ancient world [...]
I was finally on my way to the Inca citadel of Machu Picchu, fulfilling a longtime dream to see the Andes Mountains and the archaeological wonders of Peru. While hiking along the steep paths and [...]