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Living in the Pacific Northwest, where darkness falls at about 3:45 pm in December, has made me acutely aware of my Irish ancestors' keen interest in tracking the sun and stars. It is delightful to have this novel to help me to imagine what inspired the people who created the megalithic architecture along the River Boyne, which served as a seasonal clock.
The following link is an recent article in the Irish Times on this subject.
http://www.irishtimes.com/newspaper/sciencetoday/2011/1215/1224309094012.html
Happy Holidays!