Testing the cosmological model with dark matter distribution.

An international team of astrophysicists and cosmologists have used data from the Hyper Suprime-Cam survey to measure the "clumpiness" of dark matter in the universe, known as S8, and found a value of 0.76, which does not align with the value of 0.83 derived from the cosmic microwave background. The team spent a year on a blinded analysis to protect the results from biases and found that the gap between the two values may indicate an error in one of the measurements or an incomplete cosmological model.