Subatomic particles wobble more than the laws of physics allow

Muons are the heavy cousins of electrons, and like all charged particles, they act like tiny compass needles that wobble when placed in a magnetic field. According to the Standard Model—the 'rulebook' for all known matter—this wobble should happen at a very specific frequency. However, experiments at Fermilab recently confirmed that muons wobble significantly more than they should, a finding that has sent shockwaves through the scientific community.