Orbs of the Terhume Diaspora
 Orbs of the Terhume Diaspora  618. As many as one star in twenty of FGKM types have  autochtonous life. An Earthlike, shirstleeve-habitable planet has never  yet been found in the [REDACTED] hundred decamillennia of the Diaspora.  Proteins, trace elements, mutations and diseases particular to the  interactions of two or more biologies all require either gear unique to a  narrow class of planets, or surgical or genetic modification for  shirtsleeve colonying up.   An alien biome requires centuries of  domestication and typically results in the obliteration of 80% or more  of native life. The modern Terhumene frowns upon such acts. Millennia  and decamillennia are required for the typical unliving domestication  targets, such as Venus, Mars, and Lune in the Zeroeth Age, and Sigma  Draconica in the legend-haunted First Age. Domestication possibilities  are dramatically sped up at the Fourth praxic plateaux, notably under  the Machinic Secòndment, when slipstream mastery leads to deep gal...