If Aliens Invaded Earth | Alien Encounters (Full Episode)
43:05
YouTubeScience Channel
If Aliens Invaded Earth | Alien Encounters (Full Episode)
The Arrival has ended. A swarm of small spacecraft depart their huge mothership, and hover in our atmosphere. The ships open their hatches, and deposit thousands of mysterious pods on the earth's surface. Are they a message, a gift or a weapon? Stream More Episodes of Alien Encounters: https://www.sciencechannel.com/tv-shows/alien-encounters ...
2.8M viewsOct 4, 2019
Alien Encounters Documentary
Close Encounters with Terrifying Aliens | UFO Files
28:46
Close Encounters with Terrifying Aliens | UFO Files
YouTubeHISTORY
122.6K views4 weeks ago
UFO Activity Surges Across the U.S. | Unidentified: Inside America's UFO Investigation
27:44
UFO Activity Surges Across the U.S. | Unidentified: Inside America's UFO Investigation
YouTubeHISTORY
790.2K views3 weeks ago
Cosmic Encounters EXPOSED *Marathon* | Ancient Aliens
2:12:19
Cosmic Encounters EXPOSED *Marathon* | Ancient Aliens
YouTubeHISTORY
116.5K views1 month ago
Top videos
If Aliens Ever Arrived on Earth | Alien Encounters (Full Episode)
43:06
If Aliens Ever Arrived on Earth | Alien Encounters (Full Episode)
YouTubeScience Channel
2M viewsSep 26, 2019
What If Aliens Contact Us? | Alien Encounters (Full Episode)
43:08
What If Aliens Contact Us? | Alien Encounters (Full Episode)
YouTubeScience Channel
783.6K viewsSep 19, 2019
UFO Hunters: Life-Altering Alien Encounter (S2, E8) | Full Episode | History
42:22
UFO Hunters: Life-Altering Alien Encounter (S2, E8) | Full Episode | History
YouTubeHISTORY
810.3K viewsDec 29, 2020
Roswell Incident Revisited
Infamous Roswell Incident Revealed *Marathon* | Project Blue Book
2:11:20
Infamous Roswell Incident Revealed *Marathon* | Project Blue Book
YouTubeHISTORY
34.7K views2 months ago
Roswell: The World’s Biggest Alien Cover-Up Finally Exposed
20:33
Roswell: The World’s Biggest Alien Cover-Up Finally Exposed
YouTubeReal Stories
10.3K views2 months ago
The Roswell Incident and UFO Sightings Documentary - PART 1 | Mysteries Decoded | The CW
16:56
The Roswell Incident and UFO Sightings Documentary - PART 1 | Mysteries Decoded | The CW
YouTubeThe CW Network
95.7K views7 months ago
If Aliens Ever Arrived on Earth | Alien Encounters (Full Episode)
43:06
If Aliens Ever Arrived on Earth | Alien Encounters (Full Episode)
2M viewsSep 26, 2019
YouTubeScience Channel
What If Aliens Contact Us? | Alien Encounters (Full Episode)
43:08
What If Aliens Contact Us? | Alien Encounters (Full Episode)
783.6K viewsSep 19, 2019
YouTubeScience Channel
UFO Hunters: Life-Altering Alien Encounter (S2, E8) | Full Episode | History
42:22
UFO Hunters: Life-Altering Alien Encounter (S2, E8) | Full Episode | History
810.3K viewsDec 29, 2020
YouTubeHISTORY
Forbidden Files of Extraterrestrial Contact (S1, E3) | Ancient Aliens | Full Episode
1:28:20
Forbidden Files of Extraterrestrial Contact (S1, E3) | Ancient Aliens | Full Episode
85K views2 days ago
YouTubeHISTORY
The Global Threat (Full Episode) | UFOs: Investigating the Unknown
42:15
The Global Threat (Full Episode) | UFOs: Investigating the Unknown
6.8M viewsFeb 24, 2024
YouTubeNational Geographic
New Tech Is Changing the UFO Hunt (S19, E17) | Ancient Aliens | Full Episode
42:17
New Tech Is Changing the UFO Hunt (S19, E17) | Ancient Aliens | Full Episode
111.5K views6 days ago
YouTubeHISTORY
Alien Encounters You Won't Believe | Ancient Aliens | History
57:28
Alien Encounters You Won't Believe | Ancient Aliens | History
38.4M viewsDec 15, 2022
YouTubeHISTORY
3:30:10
UFO's: Investigating the Unknown MEGA EPISODE | Secret Programs and Close Encounters | Nat Geo
7.4M viewsOct 5, 2024
YouTubeNational Geographic
24:46
Mysterious Abductions: Encounters Beyond Explanation | Ancient Aliens
297.3K views2 months ago
YouTubeHISTORY
43:03
The Military & Extraterrestrial Encounters | Ancient Aliens
272.9K views5 months ago
YouTubeHISTORY
2:48:29
Secrets Hidden in Antarctica and Beyond *Marathon* | Ancient Aliens
71.6K views1 week ago
YouTubeHISTORY
19:26
Military Encounters & Government Secrecy | UFO Hunters
20.2K views1 week ago
YouTubeHISTORY
30:21
Rural UFO Encounters That Defy Logic | UFO Files
19.8K views13 hours ago
YouTubeHISTORY
1:00:45
Alien Witnesses: Real UFO Encounters | Full Documentary | Find Out The Truth Behind UFO Cover-Ups
9.4K views2 months ago
YouTubeTHE STREAM - Movies and More
1:00:05
Real Alien Encounter Stories That Defy Explanation | The Witnesses | Full 2025 UFO Documentary
3.2K views1 month ago
YouTubeSci-Fi Central
1:09:50
Unsolved Alien Mysteries: from Alaska's Pyramid to the Freemasons | Ancient Aliens
3M views8 months ago
YouTubeHISTORY
13:29
Ancient Aliens: Top 3 Terrifying Alien Encounters (Season 20) | History
179.1K viewsFeb 15, 2024
YouTubeHISTORY
2:12:17
The Truth Behind Aliens, Cover-Ups, and the Unknown *Marathon* | Ancient Aliens
18.3K views10 hours ago
YouTubeHISTORY
1:02:37
EXTRATERRESTRIAL ENCOUNTERS: THE GREYS | Full Alien Sci-Fi Movie in English | V Movies Original
114.8K viewsMay 4, 2025
YouTubeV Movies
1:01:52
The Most Terrifying Extraordinary Alien & Cryptid Encounters! | Full Sci-Fi Documentary
7.7K views3 days ago
YouTubeSci-Fi Central
16:27
Ancient Aliens: Unbelievable Extraterrestrial Encounters in Antarctica | History
550.9K viewsMar 28, 2024
YouTubeHISTORY
42:14
UFO Sightings at Nuclear Bases (Full Episode) | UFOs: Investigating the Unknown
2.2M viewsJul 28, 2023
YouTubeNational Geographic
41:59
UFO Mystery That Shocked Mexico! | Alien Encounters: Fact or Fiction | Full Episode | Discovery
242.4K viewsDec 6, 2024
YouTubeDiscoveryChannelInd
25:48
Dark Encounters: Reptilians and Hidden Beings | Ancient Aliens
241K views1 month ago
YouTubeHISTORY
41:58
Mysteries of Sacred Mountains | Ancient Aliens
128.1K views3 days ago
YouTubeHISTORY
25:47
Aliens & the Power of Three Explained | Ancient Aliens
168.4K views4 days ago
YouTubeHISTORY
20:48
What the Government Knows About UFOs | Ancient Aliens
102.5K views1 week ago
YouTubeHISTORY
56:01
FULL EPISODE: Revelations From Alien Encounters
4.4M viewsFeb 21, 2017
YouTubeGaia
25:21
Are We Part Alien? | Ancient Aliens
67.5K views1 month ago
YouTubeHISTORY
See more