this. Even something as singular as the prediction of the Higgs boson was ~simultaneously reached by different groups(!) of people https://en.wikipedia.org/wiki/1964_PRL_symmetry_breaking_pap...
(1) hep-th had too many people chasing too few problems back then, or
(2) "scalar field with a mexican hat potential" is one of the simplest field theories you can write though it inspires all sorts of ideas like the Higgs Mechanism, Inflation, etc.