Condition for life
Since the beginning of time, long before physics discovered the existence of electromagnetism and
other forms of radiation, there has been an awareness that certain rays exist in nature and that
these rays can affect us, both negatively and positively. The shielding off of radiation has
probably also been an issue of all times. Consider the advice to move the bed or the Faraday cage,
which was developed to keep (electromagnetic) radiation out. The major drawback of such shielding
methods is that positive radiation is also blocked, including radiation that can be considered
essential to our health. There are strong indications that, for example, Schumann waves (which
arise in the ionosphere) and the geomagnetic field of the earth have very beneficial effects on
biological systems. One could almost regard them as a condition for life.