SCIENCEglobal
A strange twist in the universe’s oldest light may be bigger than we thought
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Updated 2 hours ago
First seen March 17, 2026 09:22:23Stay on top of this story
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Quick Summary
Scientists studying a mysterious effect called cosmic birefringence—a subtle twist in the polarization of the universe’s oldest light—have developed a new way to reduce uncertainty in how it’s measured. This faint rotation in the cosmic microwave background could point to entirely new physics, including hidden particles such as axions and clues about dark matter or dark energy.