User blog comment:SpartHawg948/An Open Letter Regarding Mass Effect: Deception/@comment-4411368-20120201045956/@comment-217683-20120201074925

I think we can safely say that species haven't evolved in the span of those few months to the point that atmospheres and atmospheric pressures that were lethal to them in ME2 are now A-OK for them in Deception and ME3.

/facepalm