Symmetry Magazine -
30 Jun 2020 16:57

Hadrons count among their number the familiar protons and neutrons that make up our atoms, but they are much more than that. In the early 1900s, physicists were trying to find the source of a low-level buzz of radiation that seemed to be present at all times, everywhere around the world. The reigning theory was that all of it came from the Earth itself. That quickly changed, however, when the Swiss physicist Albert Gockel used a hot air balloon to take measurements of the radiation far above sea...
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