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10:42
What Do Alien Civilizations Look Like? The Kardashev Scale
20M views • 3 years ago Kurzgesagt – In a Nutshell
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01:06:10
Alien Civilizations: How Advanced Could They Be?
549K views • 5 months ago What If
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25:03
The First Civilization to Emerge in the Galaxy
1.3M views • 2 years ago Cool Worlds
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24:20
10 Unpleasant Alien Civilization Scenarios
1.7M views • 2 years ago John Michael Godier
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01:27:12
Baffling Moon Anomalies: "I Can Promise You, The Moon Belongs to An Extraterrestrial Civilization"
207K views • 6 months ago Matrix Wisdom
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03:47:10
David Kipping: Alien Civilizations and Habitable Worlds | Lex Fridman Podcast #355
9.9M views • 1 year ago Lex Fridman
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33:12
Why We May Be Surrounded by Older Alien Civilizations
2.6M views • 3 years ago Cool Worlds
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13:17
Alien civilizations from level 1 to level 7. We are only at level 0.72
4.1M views • 2 years ago Eye of Truth
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10:29
Are There Lost Alien Civilizations in Our Past?
12M views • 2 years ago Kurzgesagt – In a Nutshell
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05:24
Ancient Aliens: Mars Rover Captures Evidence of Lost Civilization?! (Special)
810K views • 6 months ago HISTORY
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21:03
The Advanced Civilization That Existed Before Humans
1.2M views • 9 months ago Ridddle
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13:59
There Are Thousands of Alien Empires in The Milky Way
5.1M views • 1 month ago Kurzgesagt – In a Nutshell
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10:12
How Many Alien Civilizations Exist in Our Galaxy?
630K views • 1 year ago Science Time
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01:51:36
What Will Humanity Do If We Ever Discover Aliens?
1.8M views • 3 months ago Astrum
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01:21:06
Why Can't We See Evidence of Alien Life? | Documentary
1.2M views • 1 year ago Space Matters
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18:46
The Most Advanced Civilization That Scares Scientists
1.6M views • 10 months ago Fexl
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16:24
Ancient Aliens: Egyptian Mysteries Hide Proof of UFOs
2.2M views • 1 year ago HISTORY
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42:40
LIFE BEYOND 3: In Search of Giants. The Hunt for Intelligent Alien Life (4K)
9.2M views • 2 years ago melodysheep
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48:45
Ancient Aliens Documentary
396K views • 11 months ago Anunnaki Ancient Mystery
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20:14
What if Humans Are NOT Earth's First Civilization? | Silurian Hypothesis
1.6M views • 5 months ago PBS Space Time
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