Editing Accretion: A Diaspora Campaign (section)

===Yah Harri (T-4)===

Yah Harri is a partially terraformed super-Mars orbiting outside the habitable zone of its red star. The world was partially terraformed, likely by a civilization that flourished before the last Collapse. Orbital mirrors warm the planet and Yah Harri supports a thick enough atmosphere to support liquid water and a simple but robust biosphere.

A handful of low-lying areas are (barely) survivable with nothing more than heavy cold weather gear. These pockets have been occupied by T-1 wildcat colonists. The atmosphere everywhere else is so thin that it requires a pressure suit. Despite this, Yah Harri supports human life.

The Harrians are the sharpest known departure from the human 'baseline,' capable of surviving in the bitter cold at atmospheric pressures less than 30 kPa [Ed: roughly equivalent to the pressure at the summit of Mount Everest]. The typical Harrian is covered with a coat of thick hair (typically light brown or blond) and stands around two meters tall with an enormous chest cavity. 

The Harrians have maintained a rich oral history that stretches back past the most recent Collapse (over 7,000 years ago). Sociologists extrapolating from Harrian oral traditions speculate that they were once scientists or park rangers responsible for Yah Harri's terraforming project.

The native Harrians occasionally clash with colonists when highland mining projects encroach on their hunting grounds or sacred sites  but for the most part, the colonists are content to stick to the lowlands. The Harrians tolerate the presence of some outsiders (particularly if they don't look like the local colonists). Their oral history mentions a number of other worlds (including some that can be correlated with actual systems in the cluster), so the presence of aliens is not a fundamental cultural upheaval.