Universe

Physicists have found evidence challenging the century-old assumption that the universe is uniform on large scales. Three new preprint papers propose tests and analyze data showing the standard FLRW model may be flawed. The results could help resolve major cosmological puzzles.

January 05, 2026 Reported by AI

A young galaxy cluster observed in the early universe is surprisingly hot and abundant in gas, challenging scientists' models of how such structures evolve. Named SPT2349-56, the cluster's intracluster gas reaches temperatures of several tens of millions of degrees, far exceeding predictions. Researchers suggest active galaxies within it may be accelerating the heating process.