Lawyer Peter Gersen talks about classified documents about UFO's and Clifford Stone tells the story of witnessing a real-life alien attack. From Season 1 Episode 3 🇬🇧 Catch full episodes of your favourite Quest shows on discovery+: https://bit.ly/3HMUGto Subscribe to Quest TV for more great ...

Science-fiction is full of tales about invading aliens but scientists believe that encountering an alien AI is more probable, and explain why that would be more dangerous. 🇬🇧 Catch full episodes of your favourite Discovery Channel shows on discovery+: https://bit.ly/2ZgRipf Subscribe to ...