"Robert Gentry is a gifted scientist who ably communicates in this book the significance of his discovery of polonium halos in the earth's granites. I have the highest respect for his often standing almost alone in proclaiming this evidence in support of a young earth Biblical creation position. And I support his 20-year-old challenge, as yet unmet, to the scientific establishment that it produce in the laboratory even a fist-sized piece of granite and the subsequent production of a Po-218 halo in it." Stanley A. Mumma Ph.D.

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