Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas
AMA | October 2024
Sean Carroll
There's one subtlety here. because Einstein's equation relates the curvature of space-time to the amount of energy density in it. And how much energy density is in the extra dimensions of space-time? That sounds like a hard question. But the simplest kind of model is to say there is zero energy density in the extra dimensions of space-time.
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