"The nature of void offers some interesting food for thought. Visitors to the area would surely feel overwhelmed by the isolation, with its extreme distances between galaxies and blacker-than-black view of distant space.

And as blogger Michael Anissimov has noted, the Boötes void is probably the most perfect vacuum in space, the implications of which are worth considering. Not only would objects like rocks and dust be exceptionally rare, but so too would particles. It might take eons, or possibly never, for particles to interact. 

The need for an explanation has given rise to a new theory, one which suggests that supervoids are caused by the intermingling of smaller ones. Aldring has noticed that galaxies inside of voids take the curious shape of a tubular structure — likely an important clue. In turn he suspects that the Boötes void is the result of smaller voids coming together, much like how soap bubbles coalesce to form a single large one. As for the tube of galaxies, that's likely the remnant of the boundary between the smaller voids. Those galaxies, speculates Aldring, are now stranded inside the supervoid.

There is another, albeit more radical possibility — and one that has likely not been considered in the scientific literature. The Boötes void could be the result of an expanding Kardashev III scale civilization. As the colonization bubble expands outward from its home system, the civilization dims each star (and subsequently each galaxy) it encounters by blanketing it in a Dyson shell. This might also explain why the void has such a nice, spherical shape. Given that the void is about 700 million light-years from Earth, and that intelligent life could have emerged in the Universe about 4 billion years ago, this ancient civilization may have had enough time to perform this astonishing feat of cosmological engineering. Now, this is pure speculation, but it's worth throwing it out there as a possibility given the strangeness of the phenomenon."

The Boötes Void (Nihilo Ex Nihil Album Version)

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