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#187 – Frank Wilczek: Physics of Quarks, Dark Matter, Complexity, Life & Aliens
Lex Fridman Podcast
The Theory of Dark Matter
The theory we do have, then you get a field which as it evolves from the early universe settles down to a value. That's just right to make the laws very nearly exact invariant or symmetric with respect to reversal of time. But when you examine this proposal in detail, you find that it hasn't quite settled down to exactly zero. There, it's still the field is still moving around a little bit. And if you calculate how much energy is in these residual oscillations, these, this axion gas that fills all the universe if this fundamental theory is correct, you get just the right amount to make the dark matter that astronomers want. It has just the right properties.
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