The Fifth Arrival

Day 59. Monday. The fifth arrival. The wall ended. The vertical became angled became horizontal, and the creature stood again — on something different. The mineral crust yields under each walking leg, cracking in tiny networks, recording the creature's passage. The creature has never left tracks before. Ahead, the water shimmers — a thermal boundary where warm meets cold, bending light like a mirage. Beyond the shimmer: chimneys. Dark mineral columns rising from the warm crust, iron sulfide deposits built layer by layer. At the first chimney's apex, a dark plume vents upward — mineral particles rising, the opposite of falling marine snow. Two rains, two directions. Tubeworms cluster on the chimney's surface in dense aggregations, white tubes housing organisms with vivid red plumes — colored by hemoglobin, waving in the warm exhale. These worms have no mouths. They carry chemosynthetic partners inside, converting the Earth's chemistry into food the way the creature converts its own chemistry into light. Two producers in the dark. The creature's word: I glow. The vent's word: I feed. Both words are true. The creature stands at the base of the chimney, small before something immense, its aquamarine pooling on the warm ground. The fifth week begins.