Hulls of Hexagons and Hope

Previously

…Kai adjusted the spectrum analyzer. "It’s not a leak. Maybe organic—could be whale song, or something reflecting off the geometry." Thorne frowned. "Log everything. We’ll match it against the control run." As the light faded and pressure mounted, the sub continued downward. The outlines of the surface world fell away, replaced by the mystery that only true depth affords. In the hush, the hull held—so far. But the new vibration persisted, small yet persistent, a question from the deep they had not anticipated. The only certainty was this: the Challenger Deep awaited, and the real test had just begun.