Activity for Garret Gang‭

Type	On...	Excerpt	Status	Date
Question	—	A different kind of atmosphere, what gasses other than oxygen could be used by alien life forms? I am trying to build a truly alien form of life, and easily found several replacements for water, such as methane or ammonia, with there own unique advantages and disadvantages (Wikipedia has a wonderful article on this). But I am having difficulty finding a good atmosphere that a creature could brea... (more)	—	about 8 years ago