http://precedings.nature.com/tags/neolithic Recently posted documents tagged with 'neolithic' Nature Publishing Group en Nature Precedings http://precedings.nature.com/images/header_logo.gif http://precedings.nature.com http://precedings.nature.com/documents/2153/version/1 A recent computer-aided-design investigation of the Neolithic 56 Aubrey Hole circuit at Stonehenge has led to the discovery of an astonishingly simple geometrical construction for drawing an approximately regular 56-sided polygon, feasible with a compass and straightedge. In the present work, we prove analytically that the aforementioned construction yields as a byproduct, an extremely accurate method for approximating a regular heptagon, and we quantify the accuracy that prehistoric surveyors may have ideally attained using simple pegs and ropes. We compare this method with previous approximations, and argue that it is likely to be at the same time the simplest and most accurate. Implications of our findings are discussed. http://precedings.nature.com/documents/2153/version/1 Tue, 05 Aug 2008 11:12:58 UTC Pegs and Ropes: Geometry at Stonehenge hdl:10101/npre.2008.2153.1 2008-08-05 Alberto Pimpinelli Nature Precedings 2008-08-05T11:12:58Z Manuscript Earth & Environment http://creativecommons.org/licenses/by/3.0/ http://precedings.nature.com/documents/1615/version/1 The authors present the case of a late neolithic skull (14C dating: 1940 calBC) found 1921 at Bölkendorf, 60 km north-easterly of Berlin. It shows a left frontal trephination (53×50 mm) and additionally a left temporo-occipital depressed skull fracture (both survived). Microscopic and 3D-CT analyses strongly suggest that the trephination has been performed for medical purposes. http://precedings.nature.com/documents/1615/version/1 Thu, 21 Feb 2008 22:43:00 UTC Ancient Trephinations in Neolithic People – Evidence for Stone Age Neurosurgery? hdl:10101/npre.2008.1615.1 2008-02-21 Juergen Piek Nature Precedings 2008-02-21T22:43:00Z Manuscript Ecology http://creativecommons.org/licenses/by/3.0/