A large, circular, blue piece of industrial equipment used to experiment on subatomic particles.

The muon “g minus 2” magnet has a radius of 7m and operates at negative 450 degrees Fahrenheit. The rotational spin of muons is measured as they travel through the ring’s magnetic field. The ring was transported 3,200 miles from New York to Illinois over three days and travelled by barge and along toll roads to reach its destination. (Reidar Hahn/FERMILAB)

Northwestern University
After 10 years of logistical planning, Fermilab recently confirmed that previous experimentation on subatomic particles called muons may suggest the existence of an undiscovered 18th particle, report Poonam Narotam and Fiona Skeggs.