Tuesday, September 29, 2026

A New Test Looks For A Subtle Twist In Ancient Light

Visualization of the rotation of E-modes to B-modes by cosmic birefringence. Credit: Anto Lonappan and Brian Keating, made with AI assistance.

The standard model of cosmology predicts that the Universe is homogeneous. A new study tests this using the polarization of the cosmic microwave background and finds this isn't quite true. This study supports an earlier study which also found a small polarization bias.



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