Newgrange-geometry-portals (all my blogs use a combination of technical software: 1) high resolution image software; 2) Autodesk products like ACAD, Autosketch and Hplanet; 3) Mathsoft like Mathcad; 4) MS Office like MS Excel, Word, Mathematics, Quickbasic and Paint; 5) Google Earth Imaging and measuring; and a plethora of internet searching, language translators and historical archives. If the reader is unfamiliar with much of this software, then just skim down thru the details and trust, for now, that they were used professionally) Update 4/4/2023 in blue more magnetic portals Update 3/25/2023 in green magnetic portals Update 2/10/2022 in red Kerbstone 52 Many have marveled at the alignment of Newgrange underground network with the winter solstice usually just past mid-December each year. It actually is far more complex than most folks even contemplate due to the details of the location. In this discussion, the detail measurements come from the study by Wakeman ^1 arou...