It is presumed that life on Earth has evolved in the presence of natural and ubiquitous magnetic fields, that is, the geomagnetic field and magnetic storms. It is not surprising that biological systems can respond to a wide range of magnetic fields including static magnetic fields (SMFs), low-frequency magnetic fields, and pulsed magnetic fields. In modern society, there are many sources of electromagnetic fields (EMFs) or time-varying magnetic fields. Humans are exposed daily to human-made and naturally originated fields. Therefore, knowing the effects of magnetic fields on free radical reactions is particularly important when considering human health and the relation of immunological and neurodegenerative diseases and stress response. Regarding SMF effects on the functions of learning and memory, Ammari et al. investigated the behavioral effects of an SMF in male rats. The authors concluded that SMF exposure altered emotional behaviors in the plus maze and led to cognitive impairments, or at least substantial attention disorders, in the Morris water maze.