The Truth Behind Aliens, Cover-Ups, and the Unknown *Marathon* | Ancient Aliens
2:12:17
YouTubeHISTORY
The Truth Behind Aliens, Cover-Ups, and the Unknown *Marathon* | Ancient Aliens
From Bigfoot encounters and hidden extraterrestrial theories to Einstein’s revolutionary ideas and alleged government cover-ups, this marathon explores some of the most debated mysteries surrounding alien contact and the unknown. See more in this marathon. Stay up to date on all of your favorite shows on The HISTORY Channel website at http ...
68.6K views1 day ago
Extraterrestrial Life Forms
Bizarre Alien Life Forms | Known Universe: Alien Contact
4:04
Bizarre Alien Life Forms | Known Universe: Alien Contact
YouTubeNational Geographic
1M viewsApr 6, 2010
Sci-fi’s most detailed alien life form
22:50
Sci-fi’s most detailed alien life form
MSNCurious Archive
2 weeks ago
Exploring the Unknown | Alien Life Forms | Full Sci-Fi Documentary | Free Movie
1:10:11
Exploring the Unknown | Alien Life Forms | Full Sci-Fi Documentary | Free Movie
YouTubeV Movies
3K views9 months ago
Top videos
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
YouTubeHISTORY
110.6K views3 days ago
NASA’s Chief on the Odds Aliens Have Already Found Earth
1:33
NASA’s Chief on the Odds Aliens Have Already Found Earth
YouTubeBloomberg News
4.3K views2 days ago
Did Ancients Copy UFO Designs? (S19, E18) | Ancient Aliens | Full Episode
42:17
Did Ancients Copy UFO Designs? (S19, E18) | Ancient Aliens | Full Episode
YouTubeHISTORY
13K views11 hours ago
Roswell Incident Documentary
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 views3 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
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
Forbidden Files of Extraterrestrial Contact (S1, E3) | Ancient Aliens | Full Episode
1:28:20
Forbidden Files of Extraterrestrial Contact (S1, E3) | Ancient Aliens | …
110.6K views3 days ago
YouTubeHISTORY
NASA’s Chief on the Odds Aliens Have Already Found Earth
1:33
NASA’s Chief on the Odds Aliens Have Already Found Earth
4.3K views2 days ago
YouTubeBloomberg News
Did Ancients Copy UFO Designs? (S19, E18) | Ancient Aliens | Full Episode
42:17
Did Ancients Copy UFO Designs? (S19, E18) | Ancient Aliens | Full E…
13K views11 hours ago
YouTubeHISTORY
The Strange Similarities Between Humans and Aliens (S1) | Ancient Aliens
5:12
The Strange Similarities Between Humans and Aliens (S1) | Ancient …
7.7K views17 hours ago
YouTubeHISTORY
Evidence We're Dealing With MULTIPLE Alien Species | Dan Farah
8:40
Evidence We're Dealing With MULTIPLE Alien Species | Dan Far…
1.7K views2 days ago
YouTubeDanny Jones Clips
Ancient Aliens: Human-Alien Hybrids Could Be Roaming Earth | History
18:22
Ancient Aliens: Human-Alien Hybrids Could Be Roaming Earth …
1.3M viewsAug 17, 2023
YouTubeHISTORY
The Alien Files: UFOs Under Investigation (Full Episode S1|E10)
46:33
The Alien Files: UFOs Under Investigation (Full Episode S1|E10)
1.2M viewsJul 2, 2021
YouTubeExtreme Mysteries
2:06:24
Alien Evolution, Hidden Worlds & Deep Sea Secrets *Marathon* | An…
649.6K views8 months ago
YouTubeHISTORY
2:16
The Alien Perspective - Official Trailer (2025) Documentary
154.7K viewsDec 20, 2024
YouTubeIGN Movie Trailers
41:58
Mysteries of Sacred Mountains | Ancient Aliens
133.6K views4 days ago
YouTubeHISTORY
1:00:44
ALIEN RACES EXPLAINED! | Alien Arrival: Preparing For Contact
123.1K viewsJan 27, 2024
YouTubeExtreme Mysteries
42:17
New Tech Is Changing the UFO Hunt (S19, E17) | Ancient Aliens | Full E…
111.5K views1 week ago
YouTubeHISTORY
2:48:29
Secrets Hidden in Antarctica and Beyond *Marathon* | Ancient Aliens
71.6K views1 week ago
YouTubeHISTORY
44:46
The UFO Incident That Sparked a Global Debate | Alien Files Reope…
17 hours ago
YouTubeMagellanTV
2:51
Talking about aliens is a positive step: H.R. MacMillan Space Centre
12 views12 hours ago
YouTubeCBC British Columbia
0:59
Have Aliens Visited Earth?
1 day ago
YouTubeThe Clay Travis & Buck Sexton Show
46:22
Earth’s Most Alien Landscape | Undiscovered Vistas 103
12 views3 days ago
YouTubeSpaceRip
26:20
Skeletons That Defy Human History | Ancient Aliens
70.1K views2 days ago
YouTubeHISTORY
5:11
Is There Another Earth Inside Our Planet? | Ancient Aliens | The UnX…
3 views2 days ago
YouTubeThe UnXplained Zone
5:27
Ancient Aliens: Crystal City Discovered Under Antarctica (Sea…
5.8M viewsSep 12, 2022
YouTubeHISTORY
20:27
Humans From the Future | Ancient Aliens | History
1.7M viewsMay 8, 2025
YouTubeHISTORY
43:21
Alien Truth-Seekers Unite: Rick, Marty & Travis | Ancient Aliens | H…
1M views8 months ago
YouTubeHISTORY
33:12
Lost Civilizations Beyond History | Ancient Aliens
562.1K views2 months ago
YouTubeHISTORY
1:08:34
Humanity Controlled by Secret Societies | Full Documentary | Alie…
1 views2 days ago
YouTubeTHE STREAM - Movies and More
13:40
Ancient Aliens: Evidence of Life in Outer Space | History
412.1K viewsJul 25, 2024
YouTubeHISTORY
41:56
YEMEN: Discover an Alien World on Earth | 4K Travel Documentary
21 hours ago
YouTubeTRUE EARTH
9:19
Alien Intelligence in the Ocean | Deep Sea Documentary
13 hours ago
YouTubeApex Lifeform
3:03
Why Haven’t Aliens Found Earth? (We’re Basically Invisible)
15 hours ago
YouTubeIdea Infographics
25:47
Aliens & the Power of Three Explained | Ancient Aliens
168.4K views5 days ago
YouTubeHISTORY
See more videos
Static thumbnail place holder