Magnetism refers to the property of certain bodies to act with an invisible force on other bodies. This power of attraction that magnets have is, to a degree, unusual because it does not weaken after releasing energy – in normal time periods and controlled .
Magnetism has existed since the creation of the first matter, so, it is as old as the universe itself. There is no evidence that magnets were used by our first humanlike ancestors. However, there are claims that some of those early ancestors had natural .
From the very creation living things have been affected by geoelectric and geomagnetic fields and in that sense balance is achieved. As civilization has developed this balance has been disrupted. In modern buildings where armed concrete carriers are installed, the geomagnetic field is significantly .