Including results for alien theory 2021.
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Why haven’t we found aliens? A physicist shares the most popular theories. | Brian Cox
12:47
Why haven’t we found aliens? A physicist shares the most popular theories. | Brian Cox
2.9M viewsSep 29, 2023
YouTubeBig Think
Alien Theories You Have to See to Believe | Ancient Aliens | Marathon | History
2:12:17
Alien Theories You Have to See to Believe | Ancient Aliens | Marathon | History
393.7K views11 months ago
YouTubeHISTORY
The Hybrid Theory: Human or Alien? | Ancient Aliens | History
32:32
The Hybrid Theory: Human or Alien? | Ancient Aliens | History
977.9K views6 months ago
YouTubeHISTORY
Big Alien Theory
40:56
Big Alien Theory
89.8K views2 months ago
YouTubeIsaac Arthur
Inside Look At Area 51 *New Theories Revealed!* | Ancient Aliens | History
34:00
Inside Look At Area 51 *New Theories Revealed!* | Ancient Aliens | History
9.9M viewsApr 22, 2025
YouTubeHISTORY
The ancient alien theory sounded possible - until the missing evidence became impossible to ignore
31:07
The ancient alien theory sounded possible - until the missing evidence became impossible to ignore
1 month ago
MSNIsaac Arthur
Humans From the Future | Ancient Aliens | History
20:27
Humans From the Future | Ancient Aliens | History
1.7M viewsMay 8, 2025
YouTubeHISTORY
23:20
Linda Moulton Howe's BIGGEST Theories Revealed | Ancient Aliens | History
320.7K viewsMay 1, 2025
YouTubeHISTORY
1:18:32
The NEW Complete Alien Timeline (1979 - 2025)
128.6K views5 months ago
YouTubeNerdist
7:33
Mystery of Interstellar Comet 3I/ATLAS | Alien Theory or Natural Wonder? | NASA & Harvard | 4K
23.8K views6 months ago
YouTubeCNN-News18
3:29
Mystery Object Moving Unusually Towards Earth! | Comet or An Alien Probe? | WION
176.6K views9 months ago
YouTubeWION
30:49
Alien Theory: Comet 3I/ATLAS Enters Solar System With Unusual Tail Shift | The Breakfast Club
9.1K views6 months ago
YouTubeCNN-News18
UFO report: Government transparency or fodder for alien conspiracy theories?
2:05
Find in video from 01:36Other Category Involving Alien Cover
UFO report: Government transparency or fodder for alien c…
15K viewsJun 30, 2021
YouTubeWOOD TV8
1:18:48
PROOF* THAT ALIENS ARE REAL!!! (*my theory) with Neil deGrasse Tyson
381K views2 months ago
YouTubeHasan Minhaj
33:04
Outer Space’s Most Baffling Mysteries | Ancient Aliens | History
806.2K viewsMar 4, 2025
YouTubeHISTORY
59:11
Ancient Aliens: TOP UFO MYSTERIES OF 2025 | Part 1
392.8K views5 months ago
YouTubeHISTORY
2:05:33
Uncovering the Truth: Giants, Alien Relics & The Human Experiment *Marathon* | Ancient Aliens
468.1K views8 months ago
YouTubeHISTORY
8:38
Alien: Earth — Theories That Actually Fit the Timeline
49.2K views8 months ago
YouTubeScreenRant
2:16
The Alien Perspective - Official Trailer
90.5K viewsJan 2, 2025
YouTubeIGN
1:07:32
The Best NEW Science-Fiction Movies (Trailers)
9M viewsFeb 28, 2021
YouTubeKinoCheck.com
1:04:21
Top 40 Horror Movie Theories That Turned Out to Be True and 10 That Really Didn't
192.9K views7 months ago
YouTubeWatchMojo.com
Watch The Official Trailer For UFO Documentary The Alien Perspective
2:16
Find in video from 01:35The Future of Aliens
Watch The Official Trailer For UFO Documentary The Alien Perspective
2.5K viewsDec 19, 2024
YouTubeScreen Rant Plus
1:47
Investigation Alien | Official Trailer | Netflix
1.7M viewsOct 11, 2024
YouTubeNetflix
1:18:30
Brian Cox: Why black holes could hold the secret to time and space | Full Interview
4.1M views10 months ago
YouTubeBig Think
42:15
The Global Threat (Full Episode) | UFOs: Investigating the Unknown
6.8M viewsFeb 24, 2024
YouTubeNational Geographic
2:02
Alien: Romulus | Official Trailer
13.3M viewsJun 4, 2024
YouTube20th Century Studios
1:02:43
The Best NEW Science-Fiction Movies (Trailers)
1.9M viewsAug 13, 2021
YouTubeKinoCheck.com
13:20
10 Alien Species Believed to Be Visiting Earth
118.3K views10 months ago
YouTubeWatchMojo.com
1:06:43
Alien Origins | Aliens On Earth: The True Story Of Human's Origin | Full Sci-Fi Movie | Free Movie
4.2K views7 months ago
YouTubeV Movies
0:44
8:45 p.m. - Saturday, October 4 - Alien Theory: The Mystery of the Stegosaurus
19.9K viewsOct 2, 2014
YouTubeRMC DECOUVERTE
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