ABSTRACT
Magnetic properties are inherent in many materials and some substances, like lodestone, can come out of the ground with good magnetic properties. When electricity is applied to a material with good conductivity, such as copper or iron, it is possible to create an electromagnet. Since biological organisms generate electrical currents, magnetic activity is also associated with living things and can be detected with sufficiently sensitive devices. Thus, it is a versatile technology that applies to both living and nonliving targets.
