Your 7-Step Guide to the Shadow Universe

Your 7-Step Guide to the Shadow Universe : Out There: "Five-sixths of the universe is missing. That statement feels strange to write, and I’m sure it feels pretty strange to read as well. Given the vastness of the cosmos–and given how little of it humans have explored–how can we know for sure that anything is out of place? The claim sounds positively arrogant, if not delusional."