Fancy. Much more likely they just ruin their own environment and die. It has happened many times before, since the Great Oxygenation Event 2.4B years ago. http

Fancy. Much more likely they just ruin their own environment and die. It has happened many times before, since the Great Oxygenation Event 2.4B years ago. https://en.wikipedia.org/wiki/Great_Oxidation_Event https://en.wikipedia.org/wiki/Great_Oxidation_Event