Perhaps thinking about such things now was reaching too far, but as long as people were alive, they always liked to imagine things that did not exist. Perhaps that was desire, and curiosity too.
Back in the Callisto Era, no one had imagined that Human Civilization would one day reach the center of the Boötes Void, had they? Much less that humanity could achieve such heights!
At this stage, no one cared about Yue Yuan's wild thoughts, but as long as Human Civilization could break through to Cosmic Civilization, then many, many people would become like him, imagining the future, imagining what a higher-level civilization would be like.
They would not be able to stop.
Because that seed had been planted as early as the first time humanity looked up at the stars.
A person, even if no one told him of the tradition of gazing up at the stars, would awaken that yearning for the starry sky when he looked up at it. That was the curiosity hidden deep in the wisdom of Sentient Life, the sail of the thirst for knowledge.
The research continued.
While Characteristic Technology civilizations devoted themselves to studying Vacuum Zero-Point Energy starting from their own Characteristic Technology fields, the other ordinary Level Six Civilizations did not simply wait around either. They used all kinds of conventional methods to build experimental sites in the Void, where they kept trying and failing.
And so, another hundred thousand years passed.
But progress in research on Vacuum Zero-Point Energy was slow. Many civilizations were even still stuck in the most primitive Casimir Effect laboratories, changing methods again and again, designing all kinds of experiments, and measuring the data from Casimir Effect experiments using various materials.
For example, materials, the spacing between materials, structures, the influence of different parameters