Secrets of the Deep Sea 🌊👽 | Ancient Aliens & Mysteries Beneath the Ocean | Boring History for Sleep

September 28, 2026

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5 min read

Secrets of the Deep Sea

In March 1963, about 75 miles off Puerto Rico, the US Navy carrier USS Wasp was running drills when sonar picked up a target that defied explanation. For four straight days, the object refused to be shaken. It clocked over 150 knots underwater—roughly 170 miles per hour—then dropped to around 27,000 feet. In 1963, both numbers were impossible: the best submarines topped out near 45 knots and 3,000 feet, and that depth would have crushed any hull. The Navy never caught it. That encounter opens a much larger question: what if aliens don't live light years away, but right here, tucked under all that water?

The Ocean We Haven't Seen

The reason a fleet of naval officers couldn't explain that object isn't necessarily because it was supernatural. It might simply be because we barely understand the place it was hiding. Water covers roughly 71% of the planet's surface, but only about a quarter of the seafloor has been mapped in high resolution. The Seabed 2030 project, an international effort to finally chart the ocean floor, is still sitting at roughly 25%. The other three-quarters remain a blank.

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What you'll learn

1 (00:01) **The Impossible Chase: 1963 Puerto Rico** - The US Navy chases an object that clocks 150 knots underwater and drops to 27,000 feet, defying known physics
2 (01:06) **Our Planetary Blind Spot: The Unmapped Ocean** - Explains why we have barely explored 25% of the seafloor, making it the perfect hiding place
3 (05:43) **The Hostile Depths: Pressure, Darkness, and the Challenger Deep** - Describes the crushing environment that makes deep-sea exploration so difficult and rare
4 (11:09) **The Mundane Truth and the Perfect Loop** - Explains that the ocean is unexplored because it is hard and costly, creating a logical stalemate with theorists
5 (18:06) **The Delaroff Sighting: 1945, Aleutian Islands** - Fourteen military witnesses watch a large, circular object rise vertically out of the sea and circle their ship
6 (30:09) **The Shag Harbour Incident: 1967, Nova Scotia** - An object crashes into a bay, triggering an official search by the RCMP and Navy, which finds absolutely nothing
7 (43:36) **The Nimitz Encounter: 2004, Off California** - Modern fighter pilots and radar track a "tic-tac" shaped object that defies physics, confirmed by the Pentagon

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Show Notes

Beneath the surface of our oceans lies a world we still barely understand. Strange creatures, mysterious underwater formations, ancient ruins, and unexplained discoveries have inspired some of the most fascinating theories about the hidden depths of our planet.

In this episode, we explore the secrets of the deep sea through the lens of Ancient Aliens—examining mysterious underwater sites, unusual discoveries, and the questions they raise about humanity’s past. Settle in and journey into the darkness of the ocean, where history, mystery, and speculation meet.

As you drift off tonight, let the mysteries of the deep ocean carry you into sleep — Boring History for Sleep, where every story is a journey into the unknown.