What is the physics of nothing?
Ethan Siegel
1009

If space and time, spacetime, are attributes of this universe, we need a concept of “nothing” that excludes spacetime itself. Or else we can’t contemplate the beginning of spacetime, the ultimate creation event as far as we can conceive of creation. If that “nothingness” that was absent of even spacetime was itself created from some more basic “nothingness”, the human mind can’t possibly even conceive of it. So does it really exist? Does it matter?

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