Random Facts, Daily Facts, ScienceCuriousOneJanuary 12, 2015Model, staycurious, placed, Theory, Hollow, fact, Patent, facts, earthComment A man placed a US patent on his "Hollow Earth Theory" Model Random Facts, Daily Facts, ScienceCuriousOneJanuary 12, 2015Model, staycurious, placed, Theory, Hollow, fact, Patent, facts, earthComment
