Dr. Hank Krastman has spent the last 23 years researching and reporting on the Earth's Ley Lines, Vortexes, Men in Black, Crystals and Crystal Skulls and Hopi entrances to the Inner Earth. He has written and published many books and videos on these and other subjects, and until recently published UNEXPLAINED magazine. His continuing work will soon be found in INTERNATIONAL UFO LIBRARY magazine. (Ref. The Hollow Earth Insider, Vol. 2, No. 5