Underground Aliens Emerge Across the Globe (S2, E4) | Ancient Aliens | Full Episode
44:14
YouTubeHISTORY
Underground Aliens Emerge Across the Globe (S2, E4) | Ancient Aliens | Full Episode
If extraterrestrials influenced human history, can evidence of their existence be found in hidden tunnels and caverns around the world? In Season 2, Episode 4, "Underground Aliens." Stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule #AncientAliens Subscribe for more from Ancient Aliens ...
230.6K views4 weeks ago
Shorts
SHOCKING UFO MYSTERIES OF 2025 | Ancient Aliens *Full Episode Marathon*
2:05:52
945.7K views
SHOCKING UFO MYSTERIES OF 2025 | Ancient Aliens *Full Episode
HISTORY
Secrets of Mars and Ancient Visitors *Marathon* | Ancient Aliens
2:12:18
223.7K views
Secrets of Mars and Ancient Visitors *Marathon* | Ancient Aliens
HISTORY
Ancient Aliens Episodes
UFOs Beneath the Ocean & More Mysteries of the Deep (S19, E19) | Ancient Aliens | Full Episode
42:17
UFOs Beneath the Ocean & More Mysteries of the Deep (S19, E19) | Ancient Aliens | Full Episode
YouTubeHISTORY
62.4K views1 month ago
The Top Ten Alien Petroglyphs (S19, E20) | Ancient Aliens | Full Episode
41:23
The Top Ten Alien Petroglyphs (S19, E20) | Ancient Aliens | Full Episode
YouTubeHISTORY
64.5K views1 month ago
10 Strange Creatures Science Still Can't Explain | Ancient Aliens (S20, E2) | Full Episode
41:41
10 Strange Creatures Science Still Can't Explain | Ancient Aliens (S20, E2) | Full Episode
YouTubeHISTORY
41.5K views2 weeks ago
Top videos
Mysterious Places (S2, E1) | Ancient Aliens | Full Episode
44:13
Mysterious Places (S2, E1) | Ancient Aliens | Full Episode
YouTubeHISTORY
137.4K views1 month ago
Ancient Civilizations Destroyed by Catastrophes (S4, E4) | Ancient Aliens | Full Episode
44:15
Ancient Civilizations Destroyed by Catastrophes (S4, E4) | Ancient Aliens | Full Episode
YouTubeHISTORY
42.2K views2 months ago
The Anunnaki’s Secret Underground Cities (S19, E3) | Ancient Aliens | Full Episode
42:17
The Anunnaki’s Secret Underground Cities (S19, E3) | Ancient Aliens | Full Episode
YouTubeHISTORY
349.2K views3 months ago
Lost Civilizations Mysteries
Lost Season 1 - watch full episodes streaming online
Lost Season 1 - watch full episodes streaming online
justwatch.com
4 months ago
How to Track Your Lost or Stolen Samsung Phone!
0:42
How to Track Your Lost or Stolen Samsung Phone!
YouTubeTechPhD
358.1K viewsAug 21, 2022
This Baby Goat Lost Her Back Legs And Invented Her Own Way To Walk | The Dodo
1:38
This Baby Goat Lost Her Back Legs And Invented Her Own Way To Walk | The Dodo
YouTubeThe Dodo
131.3K views1 week ago
Mysterious Places (S2, E1) | Ancient Aliens | Full Episode
44:13
Mysterious Places (S2, E1) | Ancient Aliens | Full Episode
137.4K views1 month ago
YouTubeHISTORY
Ancient Civilizations Destroyed by Catastrophes (S4, E4) | Ancient Aliens | Full Episode
44:15
Ancient Civilizations Destroyed by Catastrophes (S4, E4) | Ancient Aliens | Full Episode
42.2K views2 months ago
YouTubeHISTORY
The Anunnaki’s Secret Underground Cities (S19, E3) | Ancient Aliens | Full Episode
42:17
The Anunnaki’s Secret Underground Cities (S19, E3) | Ancient Aliens | Full Episode
349.2K views3 months ago
YouTubeHISTORY
SHOCKING UFO MYSTERIES OF 2025 | Ancient Aliens *Full Episode Marathon*
2:05:52
SHOCKING UFO MYSTERIES OF 2025 | Ancient Aliens *Full Episode Marathon*
945.7K views6 months ago
YouTubeHISTORY
Secrets of Mars and Ancient Visitors *Marathon* | Ancient Aliens
2:12:18
Secrets of Mars and Ancient Visitors *Marathon* | Ancient Aliens
223.7K views1 month ago
YouTubeHISTORY
Military Encounters with the Unknown | Ancient Aliens
43:03
Military Encounters with the Unknown | Ancient Aliens
269.3K views2 weeks ago
YouTubeHISTORY
Evidence of Early Alien Contact with Earth | Ancient Aliens (S1, E99) | Full Episode | History
1:31:03
Evidence of Early Alien Contact with Earth | Ancient Aliens (S1, E99) | Full Episode | History
3.4M viewsNov 16, 2024
YouTubeHISTORY
40:21
The Mystery of Alien Travel Through History | Ancient Aliens
1.2M views2 months ago
YouTubeHISTORY
42:22
Ancient Aliens: Civilization Buried Under Antarctica's Ice?! (S14, E1) | Full Episode | History
2.3M viewsAug 8, 2024
YouTubeHISTORY
44:14
Ancient Technology Beyond Its Time (S2, E6) | Ancient Aliens | Full Episode | History
309.3K views7 months ago
YouTubeHISTORY
43:16
Ancient Aliens: Possessed Geniuses or Masterminds? (S9, E4) | Full Episode | History
2M viewsMar 12, 2025
YouTubeHISTORY
34:15
Biggest Mysteries of Egypt (Part 2) | Ancient Aliens | History
1.4M views11 months ago
YouTubeHISTORY
2:12:18
UFO Mysteries Will Shock You! *Marathon* | Ancient Aliens | History
847.8K viewsApr 14, 2025
YouTubeHISTORY
3:00:55
Ancient Aliens and UAP UFO News | Full Episodes | UFO documentary 2025
7.4K views7 months ago
YouTubeBRIGHT SIDE Universe
18:23
Unexplained Phenomena Across the American West | Ancient Aliens
214.2K views2 months ago
YouTubeHISTORY
2:12:17
Ancient Aliens: Shocking Mysteries from Beyond *Marathon* | History
326.3K viewsApr 21, 2025
YouTubeHISTORY
2:09:28
Could Aliens Unlock Human Potential? *Marathon* | Ancient Aliens
130.5K views1 month ago
YouTubeHISTORY
See more
Static thumbnail place holder

Short videos

44:14
Underground Aliens Emerge Across the Globe (S2, E4) | …
230.6K views4 weeks ago
YouTubeHISTORY
44:13
Mysterious Places (S2, E1) | Ancient Aliens | Full Episode
137.4K views1 month ago
YouTubeHISTORY
44:15
Ancient Civilizations Destroyed by Catastrophe…
42.2K views2 months ago
YouTubeHISTORY
42:17
The Anunnaki’s Secret Underground Cities (S19, E…
349.2K views3 months ago
YouTubeHISTORY
2:05:52
SHOCKING UFO MYSTERIES OF 2025 | Ancient Aliens *F…
945.7K views6 months ago
YouTubeHISTORY
2:12:18
Secrets of Mars and Ancient Visitors *Marathon* | Ancie…
223.7K views1 month ago
YouTubeHISTORY
43:03
Military Encounters with the Unknown | Ancient Aliens
269.3K views2 weeks ago
YouTubeHISTORY
1:31:03
Evidence of Early Alien Contact with Earth | Ancien…
3.4M viewsNov 16, 2024
YouTubeHISTORY
40:21
The Mystery of Alien Travel Through History | Ancient …
1.2M views2 months ago
YouTubeHISTORY
42:22
Ancient Aliens: Civilization Buried Under Antarctica's I…
2.3M viewsAug 8, 2024
YouTubeHISTORY
44:14
Ancient Technology Beyond Its Time (S2, E6) | Ancient …
309.3K views7 months ago
YouTubeHISTORY
43:16
Ancient Aliens: Possessed Geniuses or Masterminds? …
2M viewsMar 12, 2025
YouTubeHISTORY
34:15
Biggest Mysteries of Egypt (Part 2) | Ancient Aliens | Hi…
1.4M views11 months ago
YouTubeHISTORY
2:12:18
UFO Mysteries Will Shock You! *Marathon* | Ancient …
847.8K viewsApr 14, 2025
YouTubeHISTORY
3:00:55
Ancient Aliens and UAP UFO News | Full Episodes | UF…
7.4K views7 months ago
YouTubeBRIGHT SIDE Universe
18:23
Unexplained Phenomena Across the American West …
214.2K views2 months ago
YouTubeHISTORY
2:12:17
Ancient Aliens: Shocking Mysteries from Beyond *Ma…
326.3K viewsApr 21, 2025
YouTubeHISTORY
2:09:28
Could Aliens Unlock Human Potential? *Marathon* | Anc…
130.5K views1 month ago
YouTubeHISTORY
Static thumbnail place holder