Huge Problem With Our Universe Has Simple Answer, Physicists Say

Thank you to Bombas for sponsoring this video! Head to https://bombas.yt.link/4osaIC0 and use code SABINE at checkout for 20% off your first purchase. For a decade, two ways of measuring how fast the universe expands have given different answers, a problem known as the “Hubble tension”. Now a group of physicists says the problem isn’t the supernovae but how we read the cosmic microwave background. The culprit, they say, is something we’ve ignored: magnetic fields from the birth of the universe. Crisis averted? Let’s take a look. Paper: https://doi.org/10.1038/s41550-025-02737-x #sciencenews #p