GoKawiilNew model links dark energy and dark matter to a shared 'dark dimension'
Researchers led by Teixeira, building on Khoury and Vafa's string theory work, propose that dark energy and dark matter interact and share a common origin tied to an extra 'dark dimension' far larger than other theorized hidden dimensions. In this framework, massive 'dark gravitons' leaking into this dimension could explain why the universe's measured expansion rate differs by about 9 percent depending on when it's measured, an anomaly known as the Hubble tension.
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The Hubble tension has puzzled cosmologists for years, with some suspecting measurement errors and others suspecting entirely new physics beyond the standard cosmological model. If dark matter and dark energy truly share an origin rooted in string theory's extra dimensions, it could reshape fundamental physics and offer the first observational hints of string theory's validity.
- Expansion rate measurements of the early and recent universe differ by roughly 9 percent, a puzzle called the Hubble tension.
- A new model suggests dark energy and dark matter interact and may share a common origin.
- The theory invokes a 'dark dimension' from string theory, where massive dark gravitons could explain the discrepancy.
Brian Greene's "The Elegant Universe" (book) — If string theory's vibrating strings and extra dimensions caught your eye in this story, Brian Greene's classic is the friendliest on-ramp there is. It walks through how string theory tries to unify the forces and why physicists keep reaching for hidden dimensions to explain cosmic puzzles like dark matter and dark energy.
See Brian Greene's "The Elegant Universe" (book) on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: wired.com — Steve Nadis, 2026-09-07
Published there as: “Two of the Universe's Great Mysteries May Have Their Own Dimension”
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