Life on Earth is posited to have begun with a primordial soup of the right chemicals and it began with microscopic stuff. My recollection is viruses are not dee

Life on Earth is posited to have begun with a primordial soup of the right chemicals and it began with microscopic stuff. My recollection is viruses are not deemed to fit the definition of "alive" yet contain RNA and two strands of RNA equals DNA, the code for more complex life forms. It's quite the elegant system. Also, there are microbes found in volcanic vents and in Antarctica. I don't think temperature is big a limiting factor as you seem to think. As someone once said: Life finds a way.