Move over, metaverse.
Think Daylight Savings Time is bad? At least you don't live in what scientists are calling the "anti-universe," a hypothetical mirror to the one we know and loathe — where time runs freakin' backwards, starting at the Big Bang.
These three fundamental symmetries, the scientists say, suggest the existence of a mirror universe that would be the exact opposite of ours, meaning it would be filled with oppositely charged and mirrored particles that are going backwards in time.95 percentIn this anti-universe, dark matter would be primarily made up of a new kind of neutrino, the extremely high-energy and low-density subatomic particles that carry neither a positive nor negative charge.
That's essentially how we understand dark matter as well, the physicists argue, which we cannot see but are aware of because it, too, only interacts with the rest of the universe via gravity. If symmetry exists everywhere else, the paper explains, it would necessitate right-handed neutrinos in as great an abundance as their left-handed counterparts — which would in turn be enough to account for dark matter.
We're a long way from figuring out what dark matter is. But when we do, it may be as shocking as the discovery of a flipped universe that runs backwards in time.
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