Geophysicists Discover How Rocks Produce Magnetic Pulses
The "electron pair holes" and "positive holes" described in semiconductor physics and mentioned in the above article is just another way of discussing Aether.
In order for a "hole" or "empty space" to possess charge, that space must have structure and obey mechanical laws. Such a structure can hardly be called non-existent or imaginary. It is a very real structure even if it is non-material in nature.
In several areas of physics, the existence of Aether is denied despite the observations of magnetic fields, electrostatic fields, gravitational fields, frame dragging, positive holes, electron pair holes, solitons, space-time curvature, and numerous other measurable phenomena.