There's a Hollow Earth Society too?
Yes... typically they think that the earth is hollow... some of the more scientifically correct attribute the hollow nature being related to plasma cores...
Others blame the theory on Nazi scientific propaganda.
In any event... seismic waves for one reason or another indicate a hollow, plasma or molten core at the center of the earth and the moon...
Not too sure... maybe it is just a theory and not a society... perhaps I am wrong...
You linked us to something that was showing the popularity of the search of FE vs RE, so I figured I would demonstrate the FE still wasn't as searched as NASA.
Yes... I see... This is interesting...
Am I missing any odd-ball-out theories?