In 1958 this scientist found donut-shaped zones of charged particles high in the Earth's magnetic field
In 
2013, NASA reported that the Van Allen Probes had discovered a transient, third 
radiation... [DOC] [TLE] Van Allen radiation belt | astrophysics | Britannica.com [PAR] Doughnut-shaped zones of highly energetic charged particles trapped at high 
altitudes in the magnetic field of Earth.