RING OF BRODGAR reveals seven-fold symmetry through precise surveying

Alexander Thom's surveying work at RING OF BRODGAR uncovered seven-fold geometry based on Pythagorean triangles — and the slight inaccuracy is imperceptible, suggesting remarkable precision. Here's the catch: seven cannot be constructed with compass and straight edge, so how did they achieve it? The answer may lie in three gold breastplates in the British Museum and Dorset, which served as templates for seven divisions. Two gold plates found with important burials suggest these were tools of significance. A puzzle that challenges assumptions about Neolithic capabilities.