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Mass Effect 2 Planetary Database: Entry Details
Tuchanka
System: Krogan DMZ
Cluster: Aralakh
Anomaly/Landable: Yes
Installation: Base Installation
Capital: Currently Urdnot (Since 2183)
CDEM Garrison: 2,400 (in orbital battlestations)
Population: 2.1 billion
Orbital Distance: 5.3 AU
Orbital Period: 16.7 Earth Years
Radius: 8,293 km
Day Length: 21.4 Earth Hours
Atmospheric Pressure: 1.1 Earth Atmospheres
Surface Temperature: 72 Celsius (36 in shrouded areas)
Surface Gravity: 1.14 G
Scarred by bombardment craters, radioactive rubble, choking ash, salt flats, and alkaline seas, Tuchanka can barely support life. Thousands of years ago, life grew in fierce abundance under the F-class star Aralakh (a Raik clan word meaning "Eye of Wrath"). Tree-analogues grew in thick jungles, their roots growing out of shallow, silty seas. Life fled upon life in an evolutionary crucible. This world died in nuclear firestorms after the krogan split the atom. A "little ice age" of nuclear winter killed of much of the remaining plant life.

In recent centuries, many krogan have returned to their homeworld. The reduced albedo has caused global temperatures to rise. In order to maintain livable temperatures, a vast shroud was assembled at the L1 Lagrange point. It was maintained by the Council Demilitarization Enforcement Mission (CDEM), which is based on orbiting battlestations.

CDEM ADVISORY: Visitors to Tuchanka land at their own risk. The CDEM will not attempt to extract citizens threatened by clan warfare.

TRAVEL ADVISORY: The ecology of Tuchanka is deadly. Nearly every native species engages in some predatory behavior; even the remaining vegetation is carnivorous. Travel beyond guarded areas is strongly discouraged.