Since the above lines were written science has learned much more about the electromagnetic radiations which have been present in the biosphere — the region which living organisms inhabit— throughout the whole epoch of evolution. Scientists have discovered more and more new natural electromagnetic radiations in various ranges of the electromagnetic spectrum. To the long-investigated range of solar radiations — infrared to ultraviolet — we have now added ionizing radiations (x rays and γ rays) of cosmic and terrestrial origin. In the remaining lower-frequency region of the electromagnetic spectrum, the discovery of the slow periodic variations (seasonal, monthly, diurnal) of the earth’s magnetic and electric fields was followed by the discovery of the short-period fluctuations of the earth’s magnetic field with frequencies extending to hundreds of hertz. The investigation of atmospheric discharges has shown that the electromagnetic radiations produced in this case cover a wide range of wavelengths — from superlong to ultrashort. Finally, radio emission in the range of meter to millimeter waves from the sun and the galaxies has been discovered.
KeywordsLiving Organism Electromagnetic Radiation Biological Object Electromagnetic Spectrum Constant Magnetic Field
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