Would the universe rotate plane polarized light?

AI Thread Summary
The discussion highlights the relationship between chirality and chemical reactions, noting that reactions between achiral molecules yield symmetrical products or racemic mixtures, while chiral molecules can produce a variety of outcomes. This leads to the observation that, over billions of years, chemical reactions may trend towards symmetry. However, the implication that the universe consists mainly of achiral molecules or racemic mixtures is challenged by the existence of life on Earth, which predominantly utilizes levo-rotatory amino acids. This indicates that while symmetry may be a tendency in chemical reactions, it does not necessarily dictate the overall composition of the universe.
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I posted this in cosmology too, but I felt it deserved to be here also.

I recently learned something about chemical reactions: A reaction between two achiral molecules will always yield either a symmetrical product or a racemic mixture/s. A reaction involving chiral molecules may yield any possible product. Thus symmetry is always preserved, but asymmetry may yield symmetry.

Given billions of years of chemical reactions, regardless of what molecules we started with it would seem that we are proceding toward symmetry. Does this mean that the universe must be composed entirely, or virtually entirely, of some combination of achiral molecules and racemic mixtures?
 
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I don't think that follows. Life on Earth, for example, uses only levo-rotatory amino acids (with a few exceptions).
 
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