At the smallest level, nature is governed by quantum mechanics.
The quantum theory account for all the forces of nature but not gravity. When physicists try to apply quantum theory to gravity, space and time start to fluctuate wildly, almost as if falling apart. This is incompatible with the outcome of Einstein’s theory.
Some physicists conclude that space and time may not be as fundamental as we thought. Instead, they seem more like byproducts of something deeper.
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Strange things happen when you try to combine Einstein’s description of curved space-time with a universe made up of quantum wavefunctions. This podcast shows how space and time are emergent properties of quantum reality but not fundamental parts of it.
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