Why haven’t we found aliens? A physicist shares the most popular theories. | Brian Cox
12:47
YouTubeBig Think
Why haven’t we found aliens? A physicist shares the most popular theories. | Brian Cox
Become a Big Think member to unlock expert classes, premium print issues, exclusive events and more: https://bigthink.com/membership/?utm_source=youtube&utm_medium=social&utm_campaign=yt_desc Chances are, we’re not alone in the universe. But if that’s true — why can’t we seem to find our neighbors? This question is known as the Fermi ...
已浏览 288.8万 次2023年9月29日
Alien Planet Wildlife
The Global Threat (Full Episode) | UFOs: Investigating the Unknown
42:15
The Global Threat (Full Episode) | UFOs: Investigating the Unknown
YouTubeNational Geographic
已浏览 673.8万 次2024年2月24日
Mysteries on Mars | NASA's Unexplained Files | Science Channel
52:23
Mysteries on Mars | NASA's Unexplained Files | Science Channel
YouTubeScience Channel
已浏览 22.1万 次5 个月之前
The Alien Sea Creatures Lurking Beneath the Surface
52:39
The Alien Sea Creatures Lurking Beneath the Surface
YouTubeReal Wild
已浏览 3.1万 次4 个月之前
热门视频
Creatures in Alien: Earth Ranked from Least to Most Terrifying
0:57
Creatures in Alien: Earth Ranked from Least to Most Terrifying
YouTubeWatchMojo.com
已浏览 10.8万 次7 个月之前
10 Alien Species Believed to Be Visiting Earth
13:20
10 Alien Species Believed to Be Visiting Earth
YouTubeWatchMojo.com
已浏览 11.7万 次9 个月之前
How to search for alien planets - with Nikku Madhusudhan
12:59
How to search for alien planets - with Nikku Madhusudhan
YouTubeThe Royal Institution
已浏览 2756 次3 周前
Space Creature Documentaries
Deadly Alien Worlds Beyond Earth - A Journey to Mysterious Exoplanets | Space Documentary
1:31:08
Deadly Alien Worlds Beyond Earth - A Journey to Mysterious Exoplanets | Space Documentary
YouTubeWUFO - Science
已浏览 6.8万 次3 个月之前
Is Alien Life Hiding in Our Solar System? | Life In Outer Space | FULL DOCUMENTARY
52:11
Is Alien Life Hiding in Our Solar System? | Life In Outer Space | FULL DOCUMENTARY
YouTubeNaked Science
已浏览 43.5万 次10 个月之前
Alien Contact: How Would Humanity React? | FULL DOCUMENTARY
1:30:54
Alien Contact: How Would Humanity React? | FULL DOCUMENTARY
YouTubeNaked Science
已浏览 67.3万 次2025年3月9日
Creatures in Alien: Earth Ranked from Least to Most Terrifying
0:57
Creatures in Alien: Earth Ranked from Least to Most Terrifying
已浏览 10.8万 次7 个月之前
YouTubeWatchMojo.com
10 Alien Species Believed to Be Visiting Earth
13:20
10 Alien Species Believed to Be Visiting Earth
已浏览 11.7万 次9 个月之前
YouTubeWatchMojo.com
How to search for alien planets - with Nikku Madhusudhan
12:59
How to search for alien planets - with Nikku Madhusudhan
已浏览 2756 次3 周前
YouTubeThe Royal Institution
What If We Found Alien Life on K2-18 b?
24:21
What If We Found Alien Life on K2-18 b?
已浏览 70万 次9 个月之前
YouTubeWhat If
Is Alien Life Hiding in Our Solar System? | Life In Outer Space | FULL DOCUMENTARY
52:11
Is Alien Life Hiding in Our Solar System? | Life In Outer Space | FU…
已浏览 43.5万 次10 个月之前
YouTubeNaked Science
The Animal Connection to the Gods | Ancient Aliens | History
24:15
The Animal Connection to the Gods | Ancient Aliens | History
已浏览 10.3万 次6 个月之前
YouTubeHISTORY
9 alien planet discoveries that were out-of-this-world in 2022
1:32
9 alien planet discoveries that were out-of-this-world in 2022
2022年12月27日
SPACE.comCharles Q. Choi
18:36
Ancient Aliens: Reptile OVERLORDS Walk Among Us?! | …
已浏览 124.9万 次2023年8月31日
YouTubeHISTORY
3:04
Alien: Earth’s Eyeball Creature Explained
已浏览 3.1万 次7 个月之前
YouTubeScreen Rant
7:00
Is There Alien Life On Venus? | Planet Explorers | BBC Earth Scie…
已浏览 6.6万 次2023年7月1日
YouTubeBBC Earth Science
3:07
Alien Creatures Hiding in Plain Sight
7 个月之前
MSNCrazy Creatures
2:08
Inseminoid (1981)
已浏览 103 次2021年2月11日
IMDb
3:39
Alien: Every Xenomorph Stage Explained
已浏览 4230 次8 个月之前
YouTubeScreenRant
52:39
The Alien Sea Creatures Lurking Beneath the Surface
已浏览 3.1万 次4 个月之前
YouTubeReal Wild
3:19
ALIEN: EARTH 'Elevated Species Of Xenomorph' Trailer (2025) New Ali…
已浏览 39.3万 次10 个月之前
YouTubeMovieGasm‍․com
5:16
Alien: Earth | On-Set Dispatches: Up Close With The New Creatures | FX
已浏览 6.8万 次6 个月之前
YouTubeFX Networks
33:54
Episode 8 - The Real Monsters | Alien: Earth – The Official Podcast
已浏览 2.2万 次6 个月之前
YouTubeFX Networks
2:23
Alien: Earth | Official Trailer | FX
已浏览 2698.3万 次10 个月之前
YouTubeFX Networks
2:53
Anomalocaris - Sea Monster
已浏览 87.2万 次2012年12月5日
YouTubeNaked Science
0:31
Alien: Earth Official "Crate" Teaser Trailer (2025) Sydney Chandler, Al…
已浏览 68.6万 次11 个月之前
YouTubeIGN
11:45
Alien: Earth | Full Season, Non-Spoiler Review
已浏览 28.2万 次8 个月之前
YouTubeIGN
3:46:58
Freakiest Animals Across the Globe | MEGA EPISODE | Nat Geo Animals
已浏览 20.2万 次8 个月之前
YouTubeNat Geo Animals
3:23
The Tyrannosaurus Rex of the Seas | Attenborough and the Giant Sea …
已浏览 332.3万 次2023年12月28日
YouTubeBBC Earth
57:28
Alien Encounters You Won't Believe | Ancient Aliens | History
已浏览 3828.6万 次2022年12月15日
YouTubeHISTORY
20:41
Ancient Aliens: 5 SHOCKING Mysteries Beneath Polar Ice | Hist…
已浏览 429.6万 次2024年3月21日
YouTubeHISTORY
8:46
Stunning Proof of Extinct Giants | Ancient Aliens | History
已浏览 216万 次2022年11月26日
YouTubeHISTORY
1:23
Alien Worlds Season 1 | Official Trailer | Netflix
已浏览 283.9万 次2020年11月14日
YouTubeNetflix
13:40
Ancient Aliens: Evidence of Life in Outer Space | History
已浏览 41.2万 次2024年7月25日
YouTubeHISTORY
6:46
Ancient Aliens: Extraterrestrials Planted Life on Earth?! (Season 2…
已浏览 9.6万 次2024年3月23日
YouTubeHISTORY
观看更多视频
静态缩略图占位符