Bartlett Publishing has put together several lists of books available from many various publishers which are essential reading for anyone interested in the topic. Check them out today!
You can view the articles from the blogs which preceded these at the following URLs:
It turns out that stone-age people developed navigation systems, too. Here is a report of a system used in England using regularly-spaced markers.
On the amusing side, here are some of the pitfalls that can happen when you try to correct a major finding in a scientific journal. The take-home lesson - scientists and journal editors are people, too, and science and scientific journals are subject to the same people problems and groupthink that plague every other organization.