image: This is the Saqqara step pyramid. This image relates to an article that appeared in the June 18, 2010, issue of Science, published by AAAS. The study, by Dr. Christopher Bronk Ramsey of the University of Oxford in Oxford, UK, and colleagues, is titled, "Radiocarbon-Based Chronology for Dynastic Egypt." view more
Credit: Image courtesy of Anita Quiles