New study reveals how dark matter formed shortly after the Big Bang

New study reveals how dark matter formed shortly after the Big Bang

Dark matter may not have needed a calm, cold start to help build the universe. That is the challenge raised by new work from researchers at the University of Minnesota Twin Cities and Université Paris-Saclay, published in Physical Review Letters. The study argues that dark matter particles could have formed while moving near the speed of light, then cooled enough over time to behave like the cold dark matter needed for galaxies and larger cosmic…