Antigravity UFOs

They can fly at blinding speed. Or hover effortlessly just a few feet above the ground. And they can do it all without making a sound.

But how is this possible? Many experts believe the answer is anti-gravity propulsion—advanced technology capable of controlling one of the most powerful forces in the universe. And some believe this gift is no longer exclusive to extraterrestrials. Is it true? Do we now secretly possess advanced anti-gravity technology? If so, how did it happen? And what are the implications for the human race? From secret alien treaties to the hidden labs of Area 51 join us as the mysteries of anti-gravity propulsion are—UNSEALED.

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S03E11 - UFO Metals