Our Universe wasn’t empty, even before the Big Bang
<p>When it comes to the physical Universe, the notion of “nothing” may truly be possible only in theory, not in practice. As we see the Universe today, it appears full of stuff: matter, radiation, antimatter, neutrinos, and even dark matter and dark energy, despite the fact that we don’t truly know the ultimate, fundamental nature of the latter two. Yet even if you took away every single quantum of energy, somehow removing it from the Universe entirely, you wouldn’t be left with an empty Universe. No matter how much you take out of it, the Universe will always generate new forms of energy.</p>
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