All
Search
Images
Videos
Shorts
Maps
News
More
Shopping
Flights
Travel
Notebook
Report an inappropriate content
Please select one of the options below.
Not Relevant
Offensive
Adult
Child Sexual Abuse
Length
All
Short (less than 5 minutes)
Medium (5-20 minutes)
Long (more than 20 minutes)
Date
All
Past 24 hours
Past week
Past month
Past year
Resolution
All
Lower than 360p
360p or higher
480p or higher
720p or higher
1080p or higher
Source
All
Dailymotion
Vimeo
Metacafe
Hulu
VEVO
Myspace
MTV
CBS
Fox
CNN
MSN
Price
All
Free
Paid
Clear filters
SafeSearch:
Moderate
Strict
Moderate (default)
Off
Filter
33:52
YouTube
HISTORY
Secrets of the Deep Sea | Ancient Aliens
Explore theories that suggest Earth’s oceans may hold clues to extraterrestrial activity, as researchers examine deep-sea mysteries, unexplained phenomena, and the possibility of intelligent life interacting with our planet’s vast underwater world. See more in this compilation. Stay up to date on all of your favorite shows on The HISTORY ...
392.8K views
2 weeks ago
Alien Theory: Most Viewed Videos
12:39
Dr. Church's Survival Within the Xenomorph Hive - Explained
YouTube
Alien Theory
3.9M views
Aug 10, 2017
13:28
Bishop's Xenomorph Encounter in the Tunnel - The Missing "Aliens" Scene?
YouTube
Alien Theory
1.9M views
Aug 6, 2019
4:19
What is the "Black Goo" in Prometheus? - Explained
YouTube
Alien Theory
1.3M views
Dec 31, 2016
Top videos
20:49
We’ve Been Searching for Aliens the Wrong Way. That’s All About To Change. . .
YouTube
PBS Space Time
661.3K views
3 weeks ago
28:55
Prophecies from the Stars | Ancient Aliens
YouTube
HISTORY
242.2K views
2 weeks ago
2:09:28
Could Aliens Unlock Human Potential? *Marathon* | Ancient Aliens
YouTube
HISTORY
130.5K views
4 weeks ago
Latest From Alien Theory
7:14
Aliens: Fireteam Elite 2 will be released this summer!
YouTube
Alien Theory
20K views
1 month ago
11:34
Did Amanda Ripley fake her own death to evade Weyland-Yutani?
YouTube
Alien Theory
16.4K views
1 month ago
1:00:19
Alien Past, Present, and Future: A Conversation with Ian Nathan
YouTube
Alien Theory
12K views
2 months ago
20:49
We’ve Been Searching for Aliens the Wrong Way. That’s All About To C
…
661.3K views
3 weeks ago
YouTube
PBS Space Time
28:55
Prophecies from the Stars | Ancient Aliens
242.2K views
2 weeks ago
YouTube
HISTORY
2:09:28
Could Aliens Unlock Human Potential? *Marathon* | Ancient Ali
…
130.5K views
4 weeks ago
YouTube
HISTORY
1:30:55
Chariots of Interstellar Gods (S1, E1) | Ancient Aliens | Full Episode
94.8K views
1 week ago
YouTube
HISTORY
2:12:17
Cosmic Clues Through Time *Marathon* | Ancient Aliens
59.8K views
2 weeks ago
YouTube
HISTORY
23:53
Sky Beings Across Lost Civilizations | Ancient Aliens
143.6K views
1 month ago
YouTube
HISTORY
2:58
Alien Theories👽🛸 | La Red
55K views
1 month ago
YouTube
Caracol Televisión
24:22
Volcanoes Connected to UFO Battles | Ancient Aliens
87.3K views
2 weeks ago
YouTube
HISTORY
1:54:16
UFO Files Hearing LIVE | Ex-UFO Investigator Alleges US Recovere
…
32.2K views
2 weeks ago
YouTube
ET Now
20:13
Alien Contact Files: Experiments and Hidden Encounters | UFO Hun
…
33K views
4 weeks ago
YouTube
HISTORY
41:25
The Top Ten Alien Influencers (S20, E1) | Ancient Aliens | Full Episode
31.9K views
2 weeks ago
YouTube
HISTORY
7:04
Were We Really the First Space Travelers? (S1) | Ancient Aliens
26.1K views
4 weeks ago
YouTube
HISTORY
2:35
Does Steven Spielberg Believe in Aliens?
18K views
1 week ago
YouTube
The New York Times
36:17
Alien science would be very different to Earth science | Ideas F
…
4.4K views
2 weeks ago
YouTube
The Institute of Art and Ideas
9:45
‘Big Hole’ on the Moon is an Alien Base? New UFO files REVEAL sho
…
2.2K views
1 week ago
YouTube
The Economic Times
2:55:01
UFO NEWS LIVE | Secret UFO Files Revealed As Internet Explodes Wit
…
1.3K views
4 weeks ago
YouTube
MIRROR NOW
31:07
The ancient alien theory sounded possible - until the missing eviden
…
2 weeks ago
MSN
Isaac Arthur
See more videos
More like this
Feedback
