Comment Re:only problem (Score 1) 237
You seem to not mention that the Cambrian EXPLOSION ( like explosion of life..) on Earth... was during a period when the Earth was CERTAINLY at least a Slush-ball... and POSSIBLY an ICEball. [science])
Not jumping to attack your position; just thought it was worth pointing out that the "environment 'needed' for evolving to create complex life... is not necessarily a fixed variable.