The effects of massive solar fluctuations in the electromagnetic field can also influence life on Earth in other significant ways. For example, it is believed that extremely minute doses of magnetite in bacteria allow swimming bacteria to orient to the geomagnetic field. Similarly, homing pigeons, bees and termites are believed to use the same magnetite in conjunction with the geomagnetic field in the form of a navigational aid -- much as humans use compasses. Recently, researchers [21, 22] have found the mineral magnetite in human brain tissue, where it may represent part of a magnetic sensing system. The consistency of size, shape and distribution of the crystals has suggested that the magnetite has some biological function. In addition, such magnetite containing tissues may interact directly with weak magnetic fields.
Interactions of human or animal tissues with magnetic fields include the possible link of electrical distribution power lines with heightened cancer incidence and the onset of Alzheimer's disease [23]. In addition, there is increasing evidence that low intensity electromagnetic energy interactions might be fundamental to life processes, including the potential for therapeutic use [24]. Gregor Wieser [25] has conducted experiments with human subjects which suggest that changes in a magnetic field, rather than its mere presence, is the important factor; and that furthermore, weaker magnetic fields (such as the Earth's geomagnetic field) may be better at influencing the brain than stronger fields! The human immune system efficiency appears to particularly susceptible to fluctuating electromagnetic field (EMF) effects [26]. Obviously, a rapidly fluctuating geomagnetic field or a field reversal would have much greater effects on the human organism.