Surprise Comeback: Dark Energy Could Be Holographic After All

Dark energy is (probably) real, but physicists still don’t know what it’s made of or how to interact with it. One idea that solves this problem is that dark matter isn’t made of anything, but is a consequence of the universe being holographic. While that idea has been floating around since the ‘90s, it's had a few problems. Now a pair of physicists claim to have solved that problem.

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