Before man, the electromagnetic spectrum was nearly empty of energy. The Extra Low Frequencies (ELF) part of the electromagnetic spectrum was filled by resonant vibrations between the Earth's surface, its magnetic field and the ionosphere (1 to 30 Hertz). The only other energy in this low range of the spectrum was produced by lightning (1000 Hertz).
All life began and evolved in this relatively constant and low level radiation environment over the past 3 billion years. It is significant that major body organs and brain wave vibration patterns of all animals and humans lie in the 1 to 30 Hertz ELF range, as do the resonant frequencies of the Earth.
It seems reasonable to assume that basic body and brain functions are likely regulated by naturally occurring ELF radiations. How might these functions be affected by man's more re-cent introduction of much stronger ELF energies?