Yes, our large 3 dimensional universe is often an answer for Fermi's paradox, but as time reaches infinity, this becomes a much smaller matter than the large sad realization that there is a temporal component at play. Most people miss this which is understandable. To a species that would spend its dwindling resources on entertaining gadgets, parlor tricks and machines of war, it would never occur to them that their flame of existence is but a flash in our 14 billion year old universe. Even if there were to be life on Mars, the odds of such clever species "obliterating" themselves before becoming colonizers are rather high; is expansion and domination of resources really a trait of a species with advanced cognitive abilities? There's life in the universe and it might be closer than we think, but its too busy killing itself over eachother's head coverings and mentally masturbating with sycophantic bots, such that itll long be dead before any pre-dead species notices them and their resource exhausted remnants and trash heaps. We're all alone together because our appearance of emergent intelligence isn't programmed. It just sort of happened and its just sort of going to screw us. So we sit here while the cosmic clock ticks away twiddling our thumbs with stupid crap that neither makes us healthy or happy. Blips in a 4 dimensional space, thinking our blip is damn special.
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