The problem with stellar physics, Austin often said, was that nature became stingy when it came to iron-56.
Up to iron, fusing light elements released energy. That energy became heat, light, and useful power. Hydrogen, helium, carbon, and silicon could all run a profitable generating plant.
Iron was different. Fusing it consumed more energy than it released. Once a star built an iron core, the cosmic bank closed its window.
Austin stood in Dreadnought Foundry 01’s machine shop, turning a four-inch silver-steel bushing on a heavy engine lathe. Level 81 had passed during the ring’s final welds with one quiet notice. Level 82 was not going to be quiet.
His display changed from calm amber to flashing red.
A deep vibration shook the sixty-foot lathe bed. The cutting bit squealed against the workpiece as Austin’s knees buckled under a sudden gravity spike.
Austin stared at the blinking timer.
CORE COLLAPSE: 71:59:58... 71:59:57...
