‘ANTIGRAVITY PROPULSION: Human or Alien Technologies?’  is a far-reaching exploration into the UFO phenomenon that covers all possible scenarios and discounts nothing. With a foreword by advanced interstellar propulsion systems expert Grant Hayman and afterword by leading scientist and space industry veteran Dr. Takaaki Musha, one of the great enigmas of all time is examined … Continue reading Space industry veterans critique ANTIGRAVITY PROPULSION,  Book 2 in ‘The Underground Knowledge Series’