Do a million quasars reveal cracks in the universe's uniformity?

Astronomers measured the dipole signal (directional motion signature) from 1.2 million quasars in the DESI survey to test whether the universe is truly uniform in all directions, a cornerstone assumption of modern cosmology. Their inferred peculiar velocity of 444 km/s agrees within measurement noise with the 370 km/s derived from the CMB, finding no statistically significant deviation from isotropy—despite recent tensions reported in radio surveys.