Though the replies here have been awesome (and highly entertaining), I'm afraid Vanadium may be right - the question becomes what other gasses would be preferable to use rather than oxygen or chlorine for breathing? What would be energy efficient enough to sustain the evolution of a highly...
Sounds interesting, but hard to sustain a group of human characters in a climate like that. Benefits of having the aliens chemically alter the composition of the atmosphere as opposed to attempting to boost temperature is its easier for human characters to survive with oxygen tanks and gasmasks...
Ok, I'm definitely open to altering this part. What would otherwise be a good substitute for chlorine in the story? It has to be 1) harmful for humans and 2) provide enough energy to be feasible for a technologically evolved race to have evolved breathing it.
Again, time frame is not really an...
Hi, I'm working on a commissioned story, the basic jist of it is aliens colonize earth, begin a lengthy process of terraforming it to fit their toxic homeworld atmosphere. I read somewhere chlorine is the most viable alternative to oxygen in terms of energy production and it's fairly common in...