Zarah Voss's Arc

Chapter 6 of 16

Back at her workshop, Zarah spread the crab's shell on her bench. She traced the layers with a finger. Thin plates, stacked loose, sliding against each other. The seams flexed where two plates met. That flex was the whole trick. It let the shell take a hit without cracking. Her power cells needed the same thing. Packed tight in the pod, they crushed each other. A rigid box killed them. She needed walls that bent. She fed the shell's shape into her replicator and hit run. The machine hummed. It printed a perfect copy of one plate, hard and clean. She snapped two plates together and pushed. They did not slide. They cracked. She tried again with thinner walls. Same result. Her replicator made rigid parts. It could not make a joint that moved. She had copied the shape but not the life in it. Zarah threw the broken plate across the bench. "It's dead plastic," she said. "The seam has to give, and mine won't." She stepped outside to cool her head. Near the landing gear, the ground moved. A mound rose from the dirt, layered in tunnels and open holes. Ants streamed over it. She crouched to watch. These were no ordinary ants. Each one carried a grain of sand and set it down with care. They fit the grains together, tight, curved, exact. The walls they built could bend along a crack and never fall. They shaped joints her machine could never print. She watched one ant seal a seam between two chambers. The seam held, but it flexed when the mound settled. That was it. That was the flexing seam she needed. Zarah went back for a fresh cell plate. She smeared a line of the crab's soft inner fluid along its edge, then set the plate beside the nest. The ants swarmed it. They laid grains along the wet line, packing them into a living seam between two hard plates. She waited through the night, feeding them fluid, moving plates into place. By morning the ants had built what her replicator could not. Two rigid cells, joined by a seam that bent under pressure and sprang back. She pressed the joined plates hard between her palms. They flexed. They did not crack. She let go. They eased back into shape. Zarah sat on the workshop step and laughed once, tired. Her machine had failed. The ants had not. She could line the pod with hundreds of these cells now, each one cradled in a seam that gave. The crushing problem was solved. But the ants worked slow, one grain at a time. She needed the seams built in days, not months. And they only worked with the crab's fluid, and she had one dead crab. She stared at the nest, already counting. The containment was solved. Feeding the builders was the new problem.