http://www.scientificamerican.com/article.cfm?id=geometric-test-universe
"Marinoni and Buzzi confirmed two tenets of the current cosmological model: that the universe is a flat space and that it is dominated by a dark energy, which makes up roughly two-thirds of the universe, that looks a lot like Albert Einstein's famed cosmological constant. (The rest comes primarily from dark matter, with ordinary matter—atoms and molecules—contributing just 4 percent or so to the total makeup of the universe.)"
It's crazy that most of the matter in the whole universe is not even tangible/detectable to humans, yet however produces a gravitational pull.
It would be hard to imagine the universe as flat, but if it is indeed flat, that would be mind-boggling. It would mean that the universe is bounded, it has an edge like in the flat earth theory, where you can "fall" off the edge. But the universe would be a 4 dimensional flat manifold.
If such vast discoveries are made every day, it just proves that we know almost nothing about the world, and the fact that we in our lifetime will probably not learn that much more is terribly sad.
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