Thexar-VII: The-Xa — Sha-El 04: Thel-Ven Xa-Sha — Subglacial Ecosystems
"Beneath 3 ша of ice exists a world that has not seen light for 5 million cycles. And there is life within it. It remembers pre-glacial Théxar." — Glaciobiologist Ven-Deep, +3,900 y.
Ruun-ak rass: → rhu [Thexar-I, Ruun 23, "Cryosphere"], → rhu [Thexar-VII, Sha-El 03, "Thar-Mor Xa-Sha"] Mor-ven: Subglacial ecosystems of Théxar lie beneath 3 ша of polar ice, sealed for millions of cycles. Chemosynthetic microbial life persists in the Ven-Deep and Khal-Sub lake systems, forming 100% endemic communities — "living fossils" of pre-glacial Théxar.

04.1 Discovery
First subglacial lake discovered +2,800 y. beneath southern polar shield. By 4,028 y., 4 major lakes known.
04.2 Lake System
| Lake | Area | Depth | Water T | Pressure | Isolation |
|---|---|---|---|---|---|
| Ven-Deep | 12,400 km² | 420 ша | −3.2°X | 280 тяж | >5 million cycles |
| Khal-Sub | 8,200 km² | 280 ша | −2.8°X | 240 тяж | >2 million cycles |
04.3 Ecosystem
100% endemics. H₂S + Fe²⁺ chemosynthesis. Microorganisms isolated for millions of cycles represent "living fossils."
Ruun Ven
- Subglacial life on Théxar has been sealed beneath 3 ша of polar ice for over 5 million cycles.
- First subglacial lake was discovered in +2,800 y.; by 4,028 y., 4 major lakes are catalogued.
- Ven-Deep (12,400 km², 420 ша deep) and Khal-Sub (8,200 km², 280 ша deep) are the two documented lake systems.
- Ecosystems are 100% endemic, driven by H₂S + Fe²⁺ chemosynthesis rather than photosynthesis.
- Isolated microorganisms constitute "living fossils" preserving pre-glacial Théxar biology.
- Glaciobiologist Ven-Deep (+3,900 y.) established the field's foundational observations.