I miss those old magazines, what a medium for transmitting ideas. I love Tesla but he really had some cra-cra ideas, particularly about Earth and oceans as conductors.
Interesting you say that about his ideas on earth science... because that's what I find most intriguing. I admit I don't completely understand him yet but I plan to further research it. In addition, there seem to be striking similarities with his Wardenclyffe Tower and the Great Pyramids of Giza (i.e. aquaphors) which all the more is curious for me.