The Higgs field was in the realm of theory for a long time. The maths matched up, but it wasn't until the LHC that scientists had the instrumentation to even lo

The Higgs field was in the realm of theory for a long time. The maths matched up, but it wasn't until the LHC that scientists had the instrumentation to even look for it. Two other collides at the time through they were getting close, but it turns out the Higgs Boson wasn't anywhere near where they thought it'd be. It took a long time and a lot of work, but the experiments are reproducible (and they were reproduced several times to ensure they had found the Higgs and to learn more properties about it).