In a "Rainbow" Universe Time May Have No Beginning
If different wavelengths of light experience spacetime differently, the big bang may never have happened
Image: cherrychil/stock.xchng
What if the universe had no beginning, and time stretched back infinitely without a big bang to start things off? That's one possible consequence of an idea called "rainbow gravity," so-named because it posits that gravity's effects on spacetime are felt differently by different wavelengths of light, aka different colors in the rainbow./.../
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