4 August 2022

Space‑time is dead

Notes

In his General Theory of Relativity, Einstein combined the three dimensions of space with the one dimension of time in what we now know as Einstein’s equations .

Ever since, physicists have thought of space and time as effectively the same thing: components of four-dimensional space-time.

This might be the biggest blunder physicists have ever made.

Stephen Wolfram, on page 22 of his book A project to find the Fundamental Theory of Physics , calls it the “one ‘wrong turn’ in the history of physics in the past century”.

Space-time is dead.

Here’s why... and how physicists got it so wrong for so long.

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Quotes

“Thinking of space and time as effectively the same thing might be the biggest blunder physicists have ever made”

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“Space and time are not the same thing... obviously”

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“Time does have an arrow... obviously”

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“Stephen Hawking tried to rescue the arrow of time through a slightly desperate reversal of the Second Law of Thermodynamics”

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“The Second Law of Thermodynamics: the more time passes, the messier the universe gets”

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“When physicists come up with exquisite equations, they stop thinking of them as a model of reality and start thinking of them as reality ”

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“The model of space and time in Wolfram Physics makes a whole lot more sense to me than space‑time ever did”

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