Pantropic Modification

In certain environments the Parahuman Baseline actually proves disadvantageous. Technological tools can mitigate most of the discomfort but for long-term inhabitation, or an embargo on certain technologies, bodysculpting and gene therapy to adapt to the environment can be worthwhile. Several “templates” are in fairly common use.
Spacer: The original baseline, retained by the Centauri population but vanishing from the Cetan and Eridani gene pool between Exodus and Contact. Those born without this mod can choose to take it through nanosurgery, as well as plating their bones with titanium to prevent degeneration in zero-g.
Aquaform: The oxygen concentration of Terran water is insufficient to sustain an endothermic metabolism, but it can supplement it. This mod adds gill slits to the sides of the neck and between the ribs, while closing off the alveoli of the lungs with sphincters while submerged, along with extending the webbing between digits. With this mod alone most can go fifteen minutes or more between breaths of air, combined with Spacer mods this time can be extended to two hours.
Arid: Amplified renal system combined with subdermal water sacs to prevent water loss. On hot worlds enlarged ears with veins for heat radiation are popular as well.
Heavyworlder: Gravities between 1 and 1.5 gs can be handled with some simple bone reinforcement and hard body training. If you want to live on a planet with 2 gravities or more you need far more drastic modifications. Over the course of several months in a healing vat at steadily increasing gravity (usually in a specially designed Bernal sphere) synthetic muscles and bone are layered on until the subject looks somewhere between a gorilla and an elcor from Mass Effect. All heavyworlders are quadrupedal, relying on waldos or occasionally lifting a hand-foot to grab something.
Low-Oxy Atmo: A lighter version of the oxygen retention modifications included in the parahuman baseline intended for thin planetary atmospheres or high altitudes. So modded parahumans have their ribcage expanded to accommodate larger lungs along with slightly elevated hemoglobin and myoglobin levels. Spacer mods function just as well in thin atmospheres as any, but they require a much heartier diet and many Cetan or Eridani colonies, as well as Outworlds, favor this mod.
Polar: Adapted to icy planets with very low surface temperatures. Usually patterned after polar bears or arctic foxes with small ears, expanded nostrils, thick fur, blubber and frequently black skin with transparent fur.
Cytoran suite: Designed specifically for the heavy metal rich environment of Cytoran, the entire population of this savage Outworld can tolerate downright toxic levels of lead, aluminum, and osmium in their diets, and they need to. During growth their system deposits these metals in their bones in the form of metallic glasses, making their skeletons extremely hardy but on the off hand that they do break the ingestion of a decent amount of native meat can accelerate the knitting process. Once this bone mass is grown their digestive tract simply stops absorbing the metals and excretes them harmlessly.

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