Cosmic Megafauna - Could Giant Alien Life Forms Exist?
41:04
YouTubeIsaac Arthur
Cosmic Megafauna - Could Giant Alien Life Forms Exist?
Space is big—but could life out there be even bigger? Join us as we ask just how enormous alien life can get—and what it might look like. Watch my exclusive video Fishbowl Starships - Water As Shielding - https://nebula.tv/videos/isaacarthur-fishbowl-starships-water-as-shielding Get Nebula using my link for 40% off an annual subscription ...
323.8K views10 months ago
Extraterrestrial life UFO Videos
119 Real UFOs 2026: Insane Raw Alien and UFO Sightings Caught on Camera
2:42:49
119 Real UFOs 2026: Insane Raw Alien and UFO Sightings Caught on Camera
YouTubeLAB 360
4.1K views2 weeks ago
UFO's Are Real | FULL MOVIE | Aliens Sci-Fi Documentary
1:32:21
UFO's Are Real | FULL MOVIE | Aliens Sci-Fi Documentary
YouTubeShout! Studios
459.7K views1 month ago
UFO's: Investigating the Unknown MEGA EPISODE | Secret Programs and Close Encounters | Nat Geo
3:30:10
UFO's: Investigating the Unknown MEGA EPISODE | Secret Programs and Close Encounters | Nat Geo
YouTubeNational Geographic
7.3M viewsOct 5, 2024
Top videos
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 views8 months ago
Ancient Aliens: Terrifying Humanoids Emerge from Subterranean Realm (Season 18) | History
5:03
Ancient Aliens: Terrifying Humanoids Emerge from Subterranean Realm (Season 18) | History
YouTubeHISTORY
5.7M viewsSep 15, 2022
Imagine Alien Life | Known Universe
1:14
Imagine Alien Life | Known Universe
YouTubeNational Geographic
1M viewsFeb 27, 2012
Extraterrestrial life SETI Project
How SETI Designed A Telescope To Look For Extraterrestrial Civilizations
1:01:27
How SETI Designed A Telescope To Look For Extraterrestrial Civilizations
YouTubeScott Manley
230.8K views6 months ago
Searching for Extraterrestrial Life (and the Drake Equation) - Sixty Symbols
25:28
Searching for Extraterrestrial Life (and the Drake Equation) - Sixty Symbols
YouTubeSixty Symbols
49.3K viewsFeb 28, 2024
SETI@home Update: 21 Years of Citizen Science—and 100 Signals to Investigate
47:45
SETI@home Update: 21 Years of Citizen Science—and 100 Signals to Investigate
YouTubeSETI Institute
1.2K views3 months 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
3K views8 months ago
YouTubeV Movies
Ancient Aliens: Terrifying Humanoids Emerge from Subterranean Realm (Season 18) | History
5:03
Ancient Aliens: Terrifying Humanoids Emerge from Subterranean Realm (Season 18) | History
5.7M viewsSep 15, 2022
YouTubeHISTORY
Imagine Alien Life | Known Universe
1:14
Imagine Alien Life | Known Universe
1M viewsFeb 27, 2012
YouTubeNational Geographic
Alien Life: Will We Know It When We See It? | World Science Festival
1:33:30
Alien Life: Will We Know It When We See It? | World Science Festival
7.4M viewsJul 17, 2014
YouTubeWorld Science Festival
The Museum of Alien Life Explained. John Boswell, Franck Marchis
43:26
The Museum of Alien Life Explained. John Boswell, Franck Marchis
7.2K viewsJan 20, 2021
YouTubeSETI Institute
Scientists find 'strongest evidence yet' of life on distant planet | BBC News
5:42
Scientists find 'strongest evidence yet' of life on distant planet | BBC News
2.1M viewsApr 17, 2025
YouTubeBBC News
Oxford astrophysicist explains why life beyond Earth could actually exist 👽 #oxforduniversity
3:58
Oxford astrophysicist explains why life beyond Earth could actually exist 👽 #oxforduniversity
99.4K views2 months ago
YouTubeUniversity of Oxford
5:50
Why we imagine aliens the way we do
1.4M viewsMar 14, 2018
YouTubeVox
43:08
The Effects of Alien Life on Earth | Alien Encounters (Full Episode)
272.7K viewsOct 10, 2019
YouTubeScience Channel
3:07
Is There Life Beyond Earth?
70.6K viewsJan 13, 2016
YouTubeInsider Science
6:46
Ancient Aliens: Extraterrestrials Planted Life on Earth?! (Season 20) | History
95.8K viewsMar 23, 2024
YouTubeHISTORY
5:12
Ancient Aliens: New Proof of Alien Life Found in Ice Cave (Season 18) | History
1M viewsAug 25, 2022
YouTubeHISTORY
5:46
What Alien Life Could Teach Us About Humanity
354K viewsDec 12, 2020
YouTubeFreethink
0:27
The 6 Most Likely Places to Find Alien Life
May 16, 2012
SPACE.comSeth Shostak
50:48
What Happens If We’re Contacted By Aliens?
16.9M viewsMar 11, 2019
YouTubeSpark
1:30:49
2020 Isaac Asimov Memorial Debate: Alien Life
274.6K viewsSep 25, 2020
YouTubeAmerican Museum of Natural History
18:36
Ancient Aliens: Reptile OVERLORDS Walk Among Us?! | History
1.3M viewsAug 31, 2023
YouTubeHISTORY
4:40
Alien DNA Found in Octopus Genetics | Ancient Aliens | History
433.2K viewsDec 10, 2022
YouTubeHISTORY
13:40
Ancient Aliens: Evidence of Life in Outer Space | History
412.1K viewsJul 25, 2024
YouTubeHISTORY
18:17
How scientist found signs of alien life and why they remain cautious | DW News
82.8K viewsApr 18, 2025
YouTubeDW News
28:46
Close Encounters with Terrifying Aliens | UFO Files
107K views2 weeks ago
YouTubeHISTORY
10:00
Aliens are already on Earth, new Harvard study speculates | LiveNOW from FOX
495.6K viewsJun 14, 2024
YouTubeLiveNOW from FOX
1:16:35
How Close Are We To Finding Alien Life?
553.9K viewsMar 13, 2024
YouTubeWhat If
1:02:13
Walking Between Worlds - Aliens and UFO Encounters (Part 2)
411.9K viewsJan 14, 2022
YouTubeExtreme Mysteries
7:00
Is There Alien Life On Venus? | Planet Explorers | BBC Earth Science
66K viewsJul 1, 2023
YouTubeBBC Earth Science
18:53
UNDENIABLE Biblical Evidence for Extraterrestrial Life
498.2K viewsAug 18, 2023
YouTubeLiving Waters
3:38
Scientists Find Strongest Evidence Yet Of Life On An Alien Planet | World News | WION
100.9K viewsApr 17, 2025
YouTubeWION
8:54
Will Aliens Look Like Human Beings?
5.5K viewsNov 22, 2024
YouTubeUnveiled
7:43
What If We Prove Aliens Exist? | Unveiled
153.7K viewsFeb 15, 2020
YouTubeUnveiled
See more