Here is another odd thought that rattles around in my cranium. Consider a super advanced race wanting to create a generational spaceship to take life on a long space journey. Not a new or original idea, there are many science fiction stories out there with huge ships that are filled with levels, including sections filled with lush forests and farm lands to feed the crew and colonists. However, most stories take the familiar view of life being sustained on the inside of the craft, which is how we most associate space travel from a historical viewpoint. All our practical knowledge of space travel comes from human missions in small metal vehicles. Science Fiction stories have replaced the metal with the stone of an asteroid in some cases, but the idea is essentially the same.
Now, consider a race so advanced that they could make planets and suns. What if they created an entire solar system to maintain one specific planet to serve as the space ship on a journey so long that even a metal star-ship would not do? What if they made a spaceship on such a grand scale that it was a living, breathing, and evolving solar system? That is essentially what we are on. Many people get the concept that we fly through space on earth as we circle the sun, but I wonder how many people think about the fact that the entire solar system is on a longer journey through the galaxy and the universe as a whole? We are on a multi-generational voyage to some unknown part of the universe. Will our progeny live to see the end of our trip? Think about it.