The Thermal-Weave
Thermolithos volans
◈ Xylos-9 — Thin-Vacuum High-Altitude Exoplanet
A porous, biomineralized colony exploiting thermal gradients to fix atmospheric carbon and silicate dust into rigid cellular structures.
Overview
On Xylos-9, the atmosphere is a conveyor belt of dust and gas. The Thermolithos volans does not swim; it rides the thermal shear. It is a colony of specialized cells encased in a porous silicate-carbon lattice. Its metabolism relies on the temperature difference between the sun-warmed surface and the freezing upper atmosphere. This gradient drives proton pumps within its cells, powering the fixation of CO2 and the reduction of silicate minerals. It captures dust via electrostatic byproducts of ion exchange, not as a primary mechanism. It is a living heat engine, converting thermal differentials into biomass.
Evolution
Evolved from surface-dwelling chemolithotrophs that colonized high-altitude ice. Selection favored gas-filled vacuoles for lift and thermal sensitivity for metabolic efficiency, eventually leading to the free-drifting colony structure of the modern Thermal-Weave.
Anatomy
A fractal network of hollow, gas-filled cellular chambers reinforced with biogenic silica. The 'skin' is a semi-permeable membrane of lipid-protein complexes. Internal fluid is a supercooled brine containing metabolic enzymes. Structural rigidity comes from the silica lattice, not gelatin.
Behavior
Drifts on thermal updrafts. Reorients to maximize thermal gradient exposure. Reproduces by releasing buoyant spores that detach when mature. Adjusts porosity to regulate internal temperature and buoyancy.
Biology
Metabolism & Energetics: Feeds on atmospheric CO2 and silicate dust; uses thermal gradients to drive cellular respiration and proton pumps.
Sensory Systems: No visual organs; senses temperature gradients and chemical concentrations via distributed thermoreceptors and chemoreceptors.
Deep Time & Contingency: Evolved from surface-dwelling chemolithotrophs; the thin atmosphere forced a shift to buoyant, thermal-driven existence.
Vitals
- size
- 5m diameter, 0.2m thick
- mass
- ~2kg (porous cellular structure)
- lifespan
- 20-30 years
- diet
- Atmospheric CO2, suspended silicates, trace minerals
- locomotion
- Passive drift via thermal currents; active buoyancy adjustment via gas vacuoles.
- classification
- Class: Silicoflora; Phylum: Aerolithos; Earth Analogue: None (closest functional analogue is a lichen colony with gas bladders).
World · Xylos-9
- star
- K-type Orange Dwarf (low UV, high IR)
- gravity
- 0.35g
- atmosphere
- Extremely tenuous CO2/Nitrogen mix; surface pressure 0.08 atm
- temp
- -140C to -60C (diurnal cycle driven by stellar flux)
The World
Field Notes
- Thermosynthetic Metabolism: Uses thermal gradients to drive ATP synthesis via biological heat engines.
- Silicate Assimilation: Digests dust for structural silicon and trace metals.
- Gas Vacuoles: Regulates buoyancy via metabolic gas production and absorption.
- Ion-Exchange Feeding: Electrostatic dust capture is a byproduct of respiration, not the primary energy source.
- Thermal Homeostasis: Adjusts porosity to regulate internal temperature against external fluctuations.
Deep Time
- The Surface ColonizationXylos-9's surface chemolithotrophs begin colonizing high-altitude ice spires.
- The Vacuole AgeEvolution of gas-filled cellular vacuoles allows passive lift in the thin atmosphere.
- The Thermal ShiftDevelopment of thermal-gradient sensitivity allows efficient energy extraction from the temperature differential.
- The Sky DetachmentFull detachment from surface; Thermolithos volans becomes the dominant filter-feeder of the jet stream.
Sightings & Comments
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