In 2021, the Muon g-2 experiment at Fermilab created headlines around the world: it found strong evidence for physics beyond the Standard Model of elementary particles and forces. Now scientists working on the experiment have a new result based on more data. They have achieved the world's most precise measurement of the anomalous magnetic moment of the muon. The new value for muon g-2 strengthens the 2021 result and doubles its precision. This sets up a showdown between theory and experiment 20 years in the making: Scientists of the Muon g-2 Theory Initiative aim to have a new, improved prediction available in the next couple of years Muon g-2 new results 2023 press release: http://news.fnal.gov/ Muon g-2 first results 2021 video: https://www.youtube.com/watch?v=ZjnK5exNhZ0 Fermilab home page: https://fnal.gov/ Muon g-2 experiment: https://muon-g-2.fnal.gov/ #gminus2 Credits: Writers: Maxwell Bernstein, Caitlyn Buongiorno, Ryan Postel, Kurt Riesselmann Featured scientists: Meghna Bhattacharya, Matt Bressler, Lorenzo Cotrozzi, Andy Edmonds, On Kim, Kim Overhage, James Mott Director/editor: Ryan Postel Production assistance: Lynn Johnson, Dan Svoboda Graphic Design: Samantha Koch