I am not a student of astronomy or physics, or any sciences for that matter. But I do have some things I wish to ask the scientific community here in the hopes of better understanding all of your viewpoints as to the title of this topic. First question: a. Assume that Earth is about to face a mass extinction (either through asteroids or human causes), one in which there will not remain any form of life as we know it (so far). What will we as a human race (collectively, leaving aside differences) do in the hopes that one day a future civilization, either evolving on Earth or from a location outside of the Earth, be able to acknowledge that previously there was intelligent life on this planet?