Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas
303 | AMA | February 2025
Sean Carroll
So there aren't really any reflective impermeable barriers, at least not ones that would last literally forever, right? Because they're made of matter. Just like for the previous question about the matter-antimatter asymmetry, there are questions about physics at super early times and super high energies we don't know the answer to.
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