Each of the 241 analysed PURSUE documents carries up to three facts that can be cross-cut: the form that was reported, the place it was reported, and the year it happened. Many carry only one or two, and those gaps are shown here rather than hidden: 18 records are undated, 86 have no usable location, and 79 describe no shape at all. Lay what remains against itself and the reported shape stops looking random. It moves.
The headline the matrix shows: the dominant reported form changes by era, and each dominant form gives way in turn. Discs and saucers take 71% of the 1940s and 45% of the 1950s, then fall to two records in the whole of the 2020s. Cylinders and Tic-Tacs own the 1990s–2010s at 65% and then recede themselves. Orbs and spheres lead the 2020s at 35%, the largest resolved share of that era, though the single biggest cell in the column is still the 36 records that resolved to no shape at all. Whether the drift is the phenomenon changing, the sensors changing, or the culture of description changing is the open question, but the drift itself is in the government's own files. The same figures are traced shape by shape on Morphology.
What the August 2026 release changes: the triangle column, which held three records for the life of this corpus, now holds thirteen. Five FBI interviews spanning 2002 to 2023 arrived at once, four of them with commissioned renderings, alongside a 1964 Navy radar-and-visual case describing a delta-shaped object off Puerto Rico. Two of those interviews describe triangles over Colorado Springs within a single month of 2023, from witnesses with no known connection. Set the shape filter to Triangle and the form stops looking like a scattering and starts looking like a column.
A second pattern the later tranches sharpen: the nuclear-site column is no longer a single 1940s cluster. Toggle “nuclear-proximity only” and the same geography runs across seventy-four years and four eras: a point of light over Sandia in 1949 and the green fireballs the Los Alamos scientists could not explain that February, a cylinder at Los Alamos in 1971, a diamond over the Pantex weapons plant in 2015, an unresolved object at Cheyenne Mountain in 2022, and dark triangles over the same Colorado Springs complex in 2023. The reported shape drifts through four categories. The address does not move. Follow it end to end on Nuclear Sentinels.