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Secrets of the Deep Sea | Ancient Aliens

2026-06-09 Entertainment
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HISTORY
HISTORY
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Description

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 Channel website at http://history.com/schedule #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Find out more about the show and watch full episodes on our site: https://histv.co/AncientAliens Check out exclusive The HISTORY Channel content: History Newsletter - https://histv.co/newsletter Website - https://histv.co/History Facebook - https://histv.co/Facebook Instagram - https://www.instagram.com/history TikTok - https://www.tiktok.com/@history "Ancient Aliens" explores the controversial theory that extraterrestrials have visited Earth for millions of years. The HISTORY® Channel, a division of A+E Global Media, is the premier destination for historical storytelling. From best-in-class documentary events, to a signature slate of industry leading nonfiction series and premium fact-based scripted programming, The HISTORY® Channel serves as the most trustworthy source of informational entertainment in media. The HISTORY® channel has been named the #1 U.S. TV network in buzz for seven consecutive years by YouGov BrandIndex, and a top favorite TV network by Beta Research Corporation. For a deeper dive, visit history.com or follow @history on Instagram, Twitter, Facebook, YouTube and TikTok.

Top Comments (10)

@Cain_Murd0ch 2026-06-09

There is likely a race of Ultraterrestrials that evolved right here on Earth alongside humanity. Perhaps more than one. I’m pretty sure that the Nordics that people have reported encountering, and that Admiral Byrd found at the South Pole in ‘47 during Operation Hijump, are a race of Ultraterrestrials that evolved long before humanity did, and are much, MUCH more technologically advanced. Who knows maybe we both evolved from primates but at some point, the Nordics branched off from mankind and became their own enlightened, highly advanced race. And yes, extraterrestrials have been visiting our planet since before we existed, and the best place to hide from technologically primitive civilizations is underwater. Pretty sure the Lake Baikal swimmers are also a race of Ultraterrestrials, and that’s just so cool. I mean c’mon, they live in the deepest lake on Earth, and manipulated gravity to throw those Soviet divers back to the surface. I’m sure it was a painful death. Note to self: whenever I encounter something otherworldly, the last thing I should do is be a Ray Stantz: “GET HER!!!” ☠️

31 5 replies
@HISTORY 2026-06-08

Stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule

25 5 replies
@Crackinjars 2026-06-10

None of these dudes who have been looking into this for some 20 or 30 years have given any thought to the possibility that these creatures aren’t from another planet or another galaxy, but from right here on earth… I think that makes a lot more sense than somehow figuring out how to get here through interstellar traveling or wormholes.

22 1 replies
@justinnott4325 2026-06-09

once you read the book of enoch and noahs ark it all makes since..

14 1 replies
@Besiktasayhan 2026-06-09

I love this channel

13
@Cain_Murd0ch 2026-06-10

32:40 that sounds more like potential interdimensional beings/locations. They could phase in and out of our dimension periodically. I believe there is SO much more to reality than we will ever really know.

9
@michaelangeloudarbe8480 2026-06-10

With all of the disclosures by the US Congress that's happening in past few days/months. It's not a theory or fiction at this point. Now I started to think that most of history channels ancient aliens episodes had a legitimate basis or truth.

7 1 replies
@VaultofAges-e3e 2026-06-11

This Channel is my favorite channel. It helps me for documentary. I love History channel.

3 1 replies
@Tolis_ae 2026-06-10

North of Puerto Rico the sea depths goes near to 8km, all is possible to happen so deep

3
@MeditativeHistory 2026-06-11

Love how the format works: take a real anomaly (a fast sonar contact, an unexplained mural), then quietly swap "we don't know yet" for "therefore aliens." Those are not the same sentence. The honest version — "the 1963 Navy sonar contact is genuinely unexplained" — is actually more interesting than the answer they staple onto it. Mystery doesn't need a spaceship to be worth your time.

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