It depends on your perspective. If one were thinking in terms of the actual physical make up of the earth into the core then there is a factual explaination. However if you wanted to think of Ants as civilizations under our feet. Or the microscopic protozoa as the Angels that are living in the "Hollow Earth". Then one could with poetry describe any pertaining situation. The Truth is. Everything in the Universe continues infinitly Outward and Inward likewise. Even my heart has at times been hollow. (IMG:
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