Simply trying to increase my knowledge of planetary development for building a world that would be hospitable to varied forms of life. For instance what would be the possibility of a species composed of gasses? What atmosphere would be compatible? Would it be possible that the interaction in certain areas would expose them to chemicals that could be life threatening? What of creatures that live entirely in the minerals of rocks? We are believed to have developed from the sea (though recent findings suggest the earth, then the sea, then land), but what if we had developed in the stratosphere? Is water or food incredibly vital for all life forms? There's a newly found creature that feeds off bacteria near some places where it was considered inhabitable for life due to the extreme heats. Extreme heat and cold can be combated. Water can be minimal. Food can be optional, instead supplied simply with another nutritional satisfaction. I know science says X and X is required to sustain life... but the world wasn't round for all of human history. Are we simply being close-minded and considering only how our planet works? We're beginning to understand how our past came about so we presume everything is like that. So very human... you know? Any out of the box thinkers out there? I couldn't care less if you were wrong. Mistakes are the building blocks of discovery. All ideas, thoughts, or relative articles/readings are more than welcome.