The oldest light we can see suggests the entire universe is actually lopsided and tilting toward one specific corner of the sky.
March 25, 2026
Original Paper
More Than Power: Revisiting the CMB Hemispherical Power Asymmetry with Morphological Descriptors
arXiv · 2603.22449
The Takeaway
New analysis of the Cosmic Microwave Background reveals that the universe isn't as uniform as we thought. Finding a 'preferred direction' challenges the fundamental Cosmological Principle, which assumes the universe should look the same no matter which way you look.
From the abstract
The Cosmological Principle assumes a statistically isotropic Universe, but the Cosmic Microwave Background (CMB) exhibits some anomalous statistical features, such as the hemispherical power asymmetry, that challenge this core assumption. We aim to expand the characterization of this anomaly by investigating the uniformity of the CMB's morphological and topological properties, testing whether the asymmetry extends beyond the variance of the temperature field. We evaluate the three Minkowski Func