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The deep blue sea is full of mysteries that will make your skin crawl! Join us as we dive into the most unsettling underwater phenomena that continue to baffle scientists and explorers alike. From vanished vessels to unexplained sounds and alien-like creatures that shouldn't exist, these oceanic enigmas will have you thinking twice before your next beach vacation.
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00:00Vast, ominous, mythical.
00:02Welcome to WatchMojo, and today we're counting down our picks for the most unsettling undersea
00:07phenomena that still aren't fully understood.
00:10I remember one sound in particular.
00:14Number 50, the purple orb.
00:16With under 30% of the global ocean having been explored, it makes sense that there would
00:20be unidentified life forms lurking within its depths.
00:23In 2016, researchers at EV Nautilus found one for themselves.
00:27So how do we get it, please?
00:30Suction.
00:30Suction.
00:31Floating thousands of feet below the surface of the Channel Islands was a vibrant purple
00:36orb.
00:36It immediately stumped the scientists, who had no clue if it was an egg sac or a sentient
00:41organism that had never been seen before.
00:43Wait for it, wait for it.
00:45They secured it and pulled it up to study it further, leading to the theory that it could
00:49be a new type of sea slug.
00:51Since then, no answer has been confirmed, meaning everything from the identity of the creature
00:55to how it survived down below is still a mystery.
00:58Number 49, Earth's Hum.
01:00Even during the quietest of times, the world is never truly silent.
01:05Around the world, some hear a never-ending droning noise now known as the hum.
01:09First of all, your ears are ringing real bad.
01:11Second of all, it's nauseating.
01:14And third of all, if it's a real bad day, it actually feels like your brain is being squeezed.
01:19For decades, scientists speculated that human-made inventions were at fault.
01:24It wasn't until 2004 that seismologists put forward a new idea, that it was caused by waves
01:30crashing against the ocean floor.
01:32However, most recordings had been taken on land at that point, leading that theory to
01:36be pushed aside.
01:37Less than a decade later, the hum was recorded deep below the surface near France's Réunion
01:42Island, and matched recordings taken above ground at the same time.
01:46Though its origins are still unknown, this breakthrough opens up the possibility of it being emitted
01:51from the core of the Earth itself.
01:53We know what it is.
01:54I mean, I feel sure we know what it is.
01:58We just have to get other people to listen to us and believe us and do something about it.
02:03Number 48, Shipwreck Lootings.
02:05Not even oceanic depths are safe from opportunists.
02:09In the past several years, there's been an uptick in divers going out to the sites of historic
02:13shipwrecks and stripping them of anything valuable, and desecrating countless watery
02:18graves in the process.
02:20Wrecks like this dot Sweden's eastern coastline.
02:23The timber is well-preserved because of the Baltic's low salt content.
02:27But the team say they've noticed several other thefts from shipwrecks in this area.
02:31Craft from World War II have been targeted, primarily for the steel used to build them.
02:35Dozens of warships that sank in eastern seas during the conflict have been looted, with
02:40several perpetrators remaining unidentified.
02:43It doesn't end there.
02:44Miles away in the Baltic Sea, wrecks dating back to the 17th century have been rifled through,
02:49resulting in the theft of several artifacts.
02:51While authorities are cracking down, there's no telling just how much has been lost or needlessly
02:57destroyed for a quick buck.
02:58Were the authorities on board to help, these archaeologists hope to be able to better protect
03:03the Baltic's underwater history, and preserve the wrecks beneath the waves for future generations
03:08to learn from.
03:10Number 47.
03:11Rogue Waves.
03:12Part of what makes the ocean so intimidating is its unpredictability.
03:16Nothing encompasses that more than rogue waves, a mysterious phenomenon that suddenly creates
03:21enormous, untamed walls of water.
03:23By definition, a rogue wave is greater than twice the height of surrounding waves.
03:27Technically, that could be a five-meter wave rolling with some shorties, or it could be
03:32a 30-meter nautical nightmare.
03:34Boats and lighthouses are no stranger to having these behemoths crash against them, with the
03:38former often capsizing after being struck.
03:41They were once believed to be a myth, until the 84-foot Draupner wave was recorded in 1995.
03:47Being disregarded for so long has resulted in our current knowledge being incredibly limited.
03:56Several causes have been suggested, from wind energy to different currents clashing with
04:00one another.
04:01Their origin has yet to be confirmed, meaning they are impossible to predict.
04:05This means that even the most peaceful day at sea has the potential to turn unexpectedly
04:09deadly.
04:10Number 46.
04:12Cold Water Mirages.
04:13Not everything is as it seems, especially not in the middle of the ocean.
04:17The often contrasting temperatures between the air and water below sometimes result in
04:21an optical illusion known as a Fata Morgana.
04:24Titanic is sailing through waters where a layer of warm air is sitting on a layer of colder,
04:30denser air.
04:31They distort images, from stacking them to stretching them beyond belief.
04:35This then tricks the mind into seeing something that isn't really there, such as supposed ghost
04:40ships and non-existent islands to UFOs.
04:42Each one is caused by a variety of different factors, making them unique from one another.
04:47Some researchers have speculated that they may have caused lookouts on the RMS Titanic
04:51to not be able to spot the iceberg that eventually led to its demise.
04:55The lookout said, oh, there was a strange haze on the horizon, but a lot of the officers said
04:59it was completely clear.
05:01But in fact, of course, both were telling the truth.
05:03It was completely clear and there was a slight haze on the horizon.
05:07Though it isn't confirmed, it would paint the maritime tragedy in a new light.
05:12Number 45.
05:13Underwater train graveyard.
05:15It's easy to see how a boat or plane would end up sinking.
05:18A train engine makes less sense, much less two of them.
05:21Sitting upright on the bottom, side by side, are two intact 19th century steam locomotives,
05:27only about the size of a modern-day work van.
05:29In 1985, a charter boat captain made a bizarre discovery off the coast of New Jersey, a pair
05:35of rare 15-ton 19th century Planet Class 222 locomotives.
05:40How they ended up 90 feet below the surface of the Atlantic is still unknown.
05:44A cowcatcher sits on the bottom not far from one of the locomotives.
05:48Other than that, it's just natural bottom in every direction.
05:51Not only is there no record of them disappearing, there's no written proof of them being built
05:55at all.
05:56Some assume they were being shipped across the sea when a storm hit, causing them to
06:00fall or be pushed off.
06:01With no answers, they've become one of the most fascinating and haunting nautical mysteries
06:05in the United States.
06:07Number 44.
06:08The Cenotes of the Yucatan Peninsula.
06:10They're a diver's dream, and a thalassophobic's worst nightmare.
06:14As we enter the Cenotes' cavern, I realize that I'm truly heading into another world.
06:20Within the Yucatan Peninsula lies countless unexplored caves and underwater sinkholes, each with
06:25their own secrets.
06:26They've formed over a period of millions of years, with some of the Cenotes having been
06:31submerged over the last few centuries.
06:33The tunnels were formed by water rushing through and dissolving the soft limestone.
06:38This has created an historic treasure trove, teeming with artifacts and fossils dating back
06:43to the Maya civilization and even earlier.
06:45With over 10,000 being known so far, and only a fraction of them having been mapped, we can
06:50only guess what else is buried within their depths.
06:52Those brave enough can dive there and see for themselves, but they may just come across
06:56the unsettling remains of ancient animals and humans alike.
07:00Number 43.
07:01The Carter Seamount.
07:02The mountains found on land are impressive on their own.
07:05The ones that form miles below the surface are nothing to sneeze at either.
07:09The waters above seamounts are alive with ocean predators, and by lighting the ocean depths,
07:16we can see...
07:17Scientists have theorized that they're the result of extinct volcanoes suddenly rising
07:21from the seafloor, but few have been studied enough to know for sure.
07:24The Carter Seamount in the Atlantic Ocean was recently found to exist on oceanic crust dating back
07:29to the Cretaceous period, but samples they collected were instead linked to an era occurring
07:34millions of years afterwards.
07:36This revealed that it was composed of multiple former landforms rather than just one.
07:41Even with all the strides made, there's more to be learned about, as well as all the other
07:45seamounts scattered throughout the sea.
07:46Much of the open Pacific is empty of life, but above seamounts, life is abundant.
07:54Number 42.
07:55Gackle Ridge
07:56The ocean has far more nooks and crannies than one might think, and few of them have
08:01been explored to the fullest extent.
08:03One of the most mysterious to date is Gackle Ridge, the area between the North American
08:07and Eurasian plates.
08:08Recent studies have revealed several secrets about the expanse.
08:11Besides being home to a plethora of active volcanoes, several hydrothermal vents have also
08:16been found.
08:17While looking into those, scientists unexpectedly discovered never-before-seen species of microscopic
08:22life and volcanic deposits.
08:23Ten foot long, two worms that have no mouth, no eyes, no gut.
08:28You'd think these findings would provide answers, but experts are still stumped.
08:32There's no telling what else lies beneath those icy depths, or one will understand even a fraction
08:37of what has already been uncovered.
08:39What's it going to look like?
08:40I can tell you right now, I have no idea what the animals are going to look like.
08:43Number 41.
08:44The Von Damme Vent Field
08:45The discovery of hydrothermal vents in 1977 was a shock to the scientific community itself.
08:52Since then, different subtypes have been noted, including the talc-based Von Damme Vent Field.
08:57It was found in 2010 and has become a source of intrigue for marine researchers.
09:02They're covered in shrimp feeding off of matter and bacteria expelled from the vents, and are
09:06home to other creatures as well.
09:08It seemed like there was a much larger shrimp accumulation, slightly uphill, another four or five meters.
09:16The shrimp have been of note due to them positioning themselves in a way that they benefit from
09:20normal water and the extreme conditions of the vents.
09:23There's still so much to be confirmed regarding how the field generates heat and houses so much life,
09:28and any concrete findings could make us rethink others existing within the ocean.
09:33They haven't made it all in there yet.
09:34I'm going to have to do a little dance with the arm.
09:37Number 40.
09:38The French submarine Surcouf
09:40Something so giant being permanently lost to the depths is truly unsettling.
09:44Surcouf was the pride of the French.
09:46At just over 360 feet long, it was the largest submarine ever built at the time.
09:52The Surcouf, by far the largest submarine in the world.
09:55With her 8-inch guns, her torpedo tubes, and her own reconnaissance plane,
09:59could have been a menace to our merchant shipping.
10:01It's as well she came over to us.
10:03That made its 1942 disappearance even more chilling.
10:07It inexplicably vanished while en route to Tahiti, taking 130 lives with it.
10:12It was reported that she had sunk after accidentally being hit by the American ship Thompson likes.
10:17That theory hasn't satisfied everyone, leading to others being created.
10:20Some have claimed that enemy officials were aboard,
10:23leading to British forces planting bombs on the hull.
10:26Others have posited that she fell victim to the Bermuda Triangle.
10:29Until the craft, or its remains, are found,
10:32then even the most unbelievable claims can't be fully dismissed.
10:36Number 39.
10:37Shipwrecks in Agulis Current
10:38When it comes to dangerous waters,
10:41infamous areas like the Bermuda Triangle immediately come to mind.
10:44There are others that are just as hazardous that we know little about.
10:47The Agulis Current along the coast of South Africa is a perfect example,
10:55often referred to as the Graveyard of Ships.
10:58The zone is riddled with intense rogue waves that sometimes reach nearly 100 feet tall.
11:03Not even the largest ships are safe from them,
11:06with over two dozen being severely damaged or sunk between 1981 and 1991 alone.
11:11While freak currents occur all over the globe,
11:15why they have been so prevalent here is still unknown.
11:18Until that's understood, should you have to travel through here,
11:21we recommend holding on as tight as you can.
11:26Number 38.
11:28The Stronsi Beast
11:29In 1808, the citizens of Stronsi, Scotland,
11:32were shocked when the corpse of an unidentifiable creature washed up on their shores.
11:36The beast was over 55 feet long, had three sets of limbs,
11:40and had bristles on its fins and down its back,
11:42which reportedly even glowed in the dark.
11:45This must have been an extraordinary sight!
11:47The identification process was made harder
11:49thanks to there being no way to preserve the remains.
11:52Some immediately claimed it was a sea serpent,
11:55while skeptics suggested it was merely a decomposed basking shark.
11:58However, the latter claims have largely been dismissed
12:01due to the differences in their sizes.
12:03With no way to test its remains,
12:05we may never know what it was,
12:07or if others like it lurk beneath the depths today.
12:10Until we have something to actually examine,
12:14I keep an open mind.
12:16Number 37.
12:17The SS Waratah
12:18Some may think that the RMS Titanic
12:20was the first major maritime loss of the 20th century.
12:23Any ship that is described as unsinkable never go on that ship.
12:26However, just a few years beforehand,
12:28211 people vanished along with the SS Waratah.
12:32At 465 feet tall and weighing thousands of tons,
12:36it was deemed unsinkable.
12:37Yet that wasn't enough to ensure its safety.
12:40She was seen for the last time on July 27, 1909.
12:43After passing the horizon, she was never seen again.
12:46Searches began days later, to no avail.
12:49More were conducted in following decades,
12:51but no sign of the ship or those aboard have been found.
12:54Several theories about its fate have been made,
12:57from whirlpools to freak waves.
12:58To this day, it remains one of the most mysterious
13:01and horrifying oceanic tragedies.
13:04Number 36.
13:05The Tonga Trench
13:05Even the deepest areas of the ocean are teeming with life.
13:09This is proven by the Tonga Trench,
13:11the second deepest on the planet.
13:13Very successful dive, very peculiar dive.
13:15Strange in a number of ways.
13:17Despite being miles below the surface,
13:19countless species have managed to survive,
13:21to the befuddlement of marine biologists everywhere.
13:24Those associated with shallow waters, such as rays,
13:27have also been seen swimming down below.
13:29Even more compelling is the Capricorn seamount
13:31being taken over by the trench itself,
13:33suggesting that those forms created by the waves
13:36may be destroyed by it as well.
13:37Despite all that has been found so far,
13:40we've only scratched the surface of what the area has to offer.
13:43With further research,
13:44there's no telling what else is lurking down there.
13:46So we're questioning ourselves at the same time
13:48as questioning the natural world.
13:50Number 35.
13:51The Upsweep Sound
13:53Researchers love making recordings
13:54of the various sounds produced within the ocean,
13:57but it's rare that one is so loud
13:59that it can be heard throughout the Pacific.
14:06First recorded in 1991,
14:09the Upsweep Sound's repeated sequences
14:10at various frequencies
14:11reminded researchers of sounds
14:13often made by alarm systems.
14:15Experts have spent decades
14:16trying to find its origin, to no avail.
14:19The noise has only decreased in volume
14:21since being heard,
14:22creating more questions about it.
14:23So far, the dominant idea
14:25is that it was caused by deep-sea volcanic activity.
14:28Yet despite having an exact source for the original sound,
14:31no concrete answer has been achieved.
14:33There's no telling what emitted the noise
14:34or what happened to suddenly make it diminish.
14:40Number 34.
14:41The Twilight Zone
14:42Go deep enough
14:44and you'll come across a vast region
14:45where the light permanently fades.
14:47There's life here,
14:48but not as we know it.
14:52Despite being shrouded in darkness,
14:54the Mesopelagic area,
14:56otherwise known as the Twilight Zone,
14:58contains a flourishing ecosystem.
15:00It takes up a majority of the planet,
15:02yet experts have barely scratched the surface
15:04of the marine life within.
15:05This fish has been living for so long here
15:08that its fins have changed
15:10into something more useful.
15:12The plethora of mysterious fish found within
15:21are interesting enough for some.
15:23Yet even more intriguing for us
15:25is the Osprey Reef,
15:26a field of coral that thrives
15:28despite being shrouded in near-total darkness.
15:31The finding redefines
15:32what was once known about underwater coral growth
15:34and survival itself at those depths.
15:37With the seemingly unending amount
15:38of sensitive species,
15:39both identified and not,
15:41it could take years
15:42before we properly learn about them all.
15:44Number 33.
15:45The Greenland Deep Coral Reef.
15:47Though the Osprey discovery proved
15:49they were in other areas,
15:50it wasn't the first of its kind to be identified.
15:53That distinction goes to the Greenland Coral Reef,
15:56which was first found back in 2012.
15:58The finding was made accidentally
15:59when researchers accidentally smashed their equipment
16:02against the stone coral
16:03while trying to search the waters it resided in.
16:05Since then,
16:06several other types have been seen
16:07within the icy waters near Greenland.
16:09Despite forming similar structures
16:11as their warm water counterparts,
16:13practically nothing is known about them.
16:15Only a small fraction of the northern reef
16:17has been studied,
16:18leaving everything from its exact age
16:20to the various creatures
16:21it serves as a breeding ground to
16:22a complete mystery.
16:24Number 32.
16:25Life Beneath the Ross Ice Shelf.
16:27In 2022,
16:29scientists came across a mind-blowing discovery,
16:32an ecosystem resting below
16:33the planet's largest ice shelf.
16:35So when we're mapping the Ross Ice Shelf,
16:38we basically were flying backwards and forwards
16:40like mowing a lawn.
16:42But this is a lawn the size of Texas.
16:44The team drilled down into the Ross Ice Shelf
16:46to make predictions about climate change,
16:48but came back with something else entirely.
16:50What they originally thought was random sediment
16:52or a marine show
16:53was actually an Antarctic river
16:55teeming with tiny arthropods.
16:57This, coupled with the 2014 revelation
16:59of sea anemones hanging upside down from the shelf,
17:02proved that it was capable of providing a habitat
17:05for multiple species.
17:06How they came to adapt to the frigid waters
17:08is still unknown.
17:10But for now,
17:10it remains one of the most intriguing
17:12nautical mysteries in recent times.
17:18Number 31.
17:19The Yonaguni Monument.
17:20Since being accidentally discovered in 1986,
17:23this landform has remained a source
17:25of constant debate.
17:26The Yonaguni Monument looks like a massive set of stairs,
17:39with edges so perfect
17:40that it seems only a human could have carved them.
17:43That was what led marine geologist Masaki Kimura
17:46to posit it being built by citizens
17:47of the mythical continent Mu.
17:49He even claimed to make out human-made amenities.
17:52His findings may have been questioned by other experts,
17:54who suggested it had formed over millions of years.
17:57Though Kimura's claims seem outlandish,
17:59until concrete evidence is found,
18:01they can't be dismissed entirely.
18:03The question of whether or not
18:04it's proof of an extinct civilization
18:06can only be answered by the depths surrounding it,
18:09meaning we may never know the truth.
18:10Yonaguni島を訪れた
18:12ダイビングの方々から
18:13よく聞くのは
18:14Yonaguni Monumentのところは
18:16非常に神秘的だ
18:18というようなことはよく聞きます。
18:20Number 30.
18:21Immortal Jellyfish.
18:23Eternal life is something
18:24you usually hear about in fiction
18:25rather than reality.
18:27However,
18:27there are some beings
18:29that have evolved
18:29to essentially live forever,
18:31even if they live in extreme conditions.
18:34Turretopsis dornii,
18:35better known as
18:36the Immortal Jellyfish,
18:37have the unique ability
18:38to return to their polyp stage
18:40when faced with something
18:41potentially deadly.
18:42While they aren't immune to predators,
18:44they can still evade
18:45other causes of death
18:46such as old age and assault.
18:48Marine biologists
18:49are still learning more
18:50about how this process,
18:52also known as
18:52transdifferentiation,
18:54truly works,
18:55and if it can be replicated
18:56in a medical setting.
18:57It's hard to believe
18:58that something so tiny
18:59may hold the key
19:00to one of humanity's
19:01biggest curiosities.
19:03Number 29.
19:04The HMS Daedalus's Sea Serpent.
19:07One of the benefits
19:12of living in modern times
19:14is that many animals
19:15have been classified,
19:16quelling fears
19:17about the existence
19:18of fantastical beasts.
19:19However,
19:20for those living in the past,
19:22seeing an unknown
19:23or unidentified creature
19:24confirmed those worries.
19:26This was the case
19:27for the crew
19:27of the HMS Daedalus,
19:29who in 1848
19:30swore they saw
19:31a large sea serpent
19:32swimming alongside their ship.
19:34They reported
19:35that it was at least
19:3660 feet long,
19:37and was more comparable
19:38to a reptile
19:39than a fish.
19:40Some modern-day specialists
19:42have asserted
19:43that they saw
19:43a sea whale,
19:44although there hasn't been
19:45any evidence
19:46confirming that theory.
19:47Given the Daedalus's
19:49description of its size
19:50and speed,
19:51there's no wonder
19:51they automatically assumed
19:52it was a monster.
19:53Cases of disappearances
20:04on dry land
20:05are already unsettling.
20:07The thought of someone
20:08going missing
20:08while surrounded
20:09by nothing but open water
20:10is even more unnerving.
20:12In 2007,
20:13a yacht
20:14dubbed Kaz 2
20:15was found miles
20:16off the coast of Australia.
20:18When it was searched,
20:19the team found
20:19that the entire crew,
20:20Derek Batten,
20:22Peter Tunstead,
20:22and James Tunstead,
20:23had vanished.
20:24There were signs
20:25of recent activity,
20:27including a table
20:28set for a meal.
20:29The life jackets
20:29and lifeboat
20:30were still there,
20:31indicating they hadn't
20:32swum or ridden away
20:34from the craft.
20:34After an investigation,
20:36the authorities concluded
20:37that they had fallen off
20:38and were unable
20:39to re-board,
20:40although other ideas,
20:41such as them being stranded
20:42on a deserted island,
20:44have also been suggested.
20:45Number 27,
20:52Giant Oarfish
20:53An ambassador of the deep
20:55comes to the borders
20:56of our world.
20:58When hearing about the things
20:59that live in the deep ocean,
21:01it's hard to fathom
21:02that some can even exist.
21:04A fish that can grow
21:05to almost 60 feet in length
21:06and weigh over half a ton
21:08is nearly inconceivable.
21:10The giant oarfish's size,
21:11dorsal fin,
21:12and multicolored body
21:13helps it look more
21:14like an alien
21:15than something you'd find
21:16at your local aquarium.
21:17While some have traversed
21:18into shallow areas,
21:20they're usually elusive.
21:21This has made it difficult
21:22to learn more
21:23about their behavioral patterns
21:24and life cycle,
21:25with research on the latter
21:27only starting
21:27in the last few years.
21:29We have the opportunity
21:30to learn more about them
21:31in real time,
21:32and when we do,
21:33it'll be an achievement
21:34in the maritime field.
21:35Seem to be definitely
21:36using the chain
21:37as a point of reference.
21:39We need to follow this up.
21:40Number 26,
21:41The Abyssal Zone
21:42Where the seafloor drops
21:44to more than 6,000 meters,
21:46the pressure is so enormous
21:48that it destroys
21:49the structure of the cells
21:51of which an animal is made.
21:53Not to be confused
21:54with the Twilight Zone,
21:55this is another point
21:56so far underwater,
21:58the light from the surface
21:59is no longer available,
22:00leaving everything
22:01in a state of total darkness.
22:03While that would be terrifying
22:04for any human to experience,
22:06there are some critters
22:07that have adapted
22:08to the harsh conditions,
22:09and even thrive in them.
22:11Turn off the submersible headlights
22:13and you see
22:14a pyrotechnic display outside.
22:17Experts are still trying
22:18to learn just how
22:19these ecosystems
22:20can be sustained
22:21in such unforgiving terrain.
22:23It's so devoid of oxygen
22:24that many beings die
22:25if they can't make it
22:26to a safer area.
22:27Those that survive,
22:29such as mollusks
22:29and crustaceans,
22:30have evolved to do so
22:32in various ways,
22:33such as extracting
22:34the element
22:35from higher waters.
22:36This zone
22:36hasn't been fully explored,
22:38meaning there could be
22:39even more organisms
22:40lurking at the bottom.
22:42Dolphin can dive
22:43to 4,500 meters,
22:45three miles below the surface.
22:48Number 25.
22:49Abandoned Lifeboat
22:50at Bouvet Island.
22:52This discovery feels
22:53like it came straight
22:54out of a horror movie.
22:55Picture the scene,
22:56a totally abandoned island
22:57with not a soul around,
22:59the only evidence
23:00of past existence
23:01being a half-sunken lifeboat.
23:03It was discovered
23:04in the 1960s
23:05and jump-started
23:06a decades-long mystery
23:07about where it came from
23:08and who could have
23:09been on board.
23:10A search was conducted,
23:12but there were no indications
23:13that a person
23:14had ever been there,
23:15besides the rowboat itself.
23:16It has remained
23:17a nautical conundrum
23:18to this day,
23:19although some have theorized
23:21that it belonged
23:21to a team
23:22of Soviet scientists.
23:23While that may explain
23:25the origins of the vessel,
23:26the question still remains
23:28of who was aboard
23:29and what happened to them.
23:31Number 24.
23:32The Devil's Sea.
23:33Waves change quickly
23:34and unpredictably.
23:35So if you're relaxed
23:38on a boat in these places,
23:39you will get into trouble.
23:41We've all heard
23:42of the Bermuda Triangle,
23:43but that isn't the only area
23:44to be wary of in the ocean.
23:46Off the coast of Japan
23:47is what's commonly referred to
23:48as the Devil's Sea,
23:50due to the strange
23:51and tragic things
23:52that have occurred there.
23:53With a nickname
23:53like the Dragon's Triangle,
23:55it's developed
23:56an ominous reputation
23:57for itself.
23:57Down here lurk
23:59powerful, deadly forces.
24:02Forces that imperil
24:03all who sail on
24:04or under the Devil's Sea.
24:06There have been plenty
24:07of supposed cryptic activities,
24:09such as a pilot
24:10reporting an odd phenomenon
24:11in the sky
24:12before disappearing,
24:13and a ship going missing
24:14for several days.
24:16Some have claimed
24:16that these strange happenings
24:18are paranormal,
24:19while skeptics insist
24:20they must be environmental.
24:22Whether the occurrences
24:23were caused by ghosts
24:24or undersea volcanoes,
24:25it's clear that something
24:27is amiss
24:28in those troubled waves.
24:29That's right in the middle
24:31of the Devil's Sea.
24:32You might as well
24:33tie a stone to your foot
24:34and jump off the boat now.
24:35It'll be an adventure.
24:37Death is not an adventure.
24:39Number 23, Bermeja.
24:41Various craft
24:42and people going missing
24:43at sea is not uncommon,
24:45but a whole island
24:46disappearing certainly is.
24:48He wants us
24:49to move the island.
24:51Bermeja was first added
24:52to naval maps
24:53in the 16th century,
24:54after being found
24:56near the coast of Yucatan.
24:57However,
24:58after a survey
24:59taken in the late 1990s,
25:01it was discovered
25:01that the islet
25:02wasn't in its supposed spot.
25:04Over a decade later,
25:06more extensive studies
25:07corroborated this discovery.
25:08This was baffling,
25:09as it had been recorded
25:10by multiple cartographers.
25:12So how did it disappear
25:14into thin air?
25:15There are some people
25:16who believe
25:16that something insidious occurred,
25:18namely the CIA
25:19destroying it
25:20to aid the United States.
25:22However,
25:22there are scientific explanations
25:24that make more sense,
25:25with the most likely
25:26being heightened ocean levels.
25:28Number 22.
25:29The Hadal Zone
25:30Everything's going haywire,
25:32and I'm getting deeper
25:33and deeper.
25:34You've maybe heard
25:35that we know less
25:36about the ocean
25:37than the dark side
25:37of the moon.
25:38We could have created
25:39that expression
25:40for the Hadal Zone,
25:41the area that lies
25:42in the deepest fathoms
25:44of the sea.
25:45Frigid cold temperatures,
25:46intensely high pressure,
25:48and barren living conditions
25:49all ensure that
25:50only the most survivalist
25:51of species lives down there.
25:52These alien-like creatures
25:54shouldn't exist,
25:55but their ethereal adaptations
25:57somehow make it possible.
25:58Its geological formations
26:00are also wondrous,
26:01sporting V-shaped trenches
26:03and submarine canyon-like
26:04depressions
26:05that could have been
26:05sculpted on Mars.
26:07Though notable explorers
26:08have reached
26:09the Mariana Trench,
26:10only a fraction
26:11of the Hadal Zone
26:12has ever been traversed.
26:13It holds great potential
26:14for undiscovered
26:15fantastical ecosystems.
26:17So what else
26:18is hiding there?
26:19Number 21.
26:20The Mariana Trench
26:21Our expedition's dive
26:23into the deepest part
26:25of the Mariana Trench
26:26has revealed
26:27sea cucumbers
26:28and amphibods.
26:29It is the deepest point
26:31in the ocean
26:31at over 35,000 feet
26:33below sea level.
26:34But beyond that,
26:35what we know
26:36is limited.
26:37The Mariana Trench
26:38is a formidable area
26:39that's teeming
26:40with biodiversity,
26:41despite being
26:42so treacherous.
26:43Here,
26:44the pressure
26:44is so intense
26:45that the only way
26:46a person could ever
26:47explore it
26:47is by drone
26:48or submarine.
26:50Even today,
26:51it is the lowest
26:52known point
26:53on the planet.
26:54While we may not survive,
26:56there are some entities
26:57that have made it
26:58their habitat.
26:59Many are single-celled,
27:01although there are
27:01more complex life forms
27:03as well.
27:03There have been dozens
27:04of dives into the trench,
27:06with the bottom
27:06finally being reached
27:07in 2020.
27:09While various sights
27:10and sounds
27:10have been recorded,
27:12there are still
27:12several unanswered
27:13questions about
27:14how existence
27:15at these depths
27:15is even possible.
27:17Their maps revealed
27:18that the Marianas Trench
27:19is just a tiny fraction
27:21of a network
27:21of enormous
27:22underwater canyons
27:24stretching right
27:25around the planet.
27:26Number 20.
27:27The Gulf of Mexico Shipwreck
27:28In May of 2019,
27:30a group of researchers
27:31from the National Oceanic
27:33and Atmospheric Administration
27:34were conducting tests
27:35with underwater drones
27:37in the Gulf of Mexico
27:38when sonar picked up
27:39this mysterious wreckage.
27:40We all just want
27:41to thank you guys
27:42for, one,
27:44finding this
27:45on a shakedown
27:46engineering dive
27:47to getting us all
27:49linked in
27:50and the opportunity
27:51to do this.
27:52Marine archaeologists
27:53across the globe
27:54were immediately contacted
27:55to watch via live stream
27:57as the drone
27:58explored the ship.
27:59Apart from the number
28:002109,
28:02the researchers
28:02were unable
28:03to identify much
28:04about this ship
28:05of unknown origin.
28:06It's estimated
28:07to have been constructed
28:08200 years ago,
28:09and based on the
28:10charred timber,
28:11it was likely burning
28:12when it sank.
28:13Just looking at
28:14this style,
28:14the thickness of this
28:15copper and the size
28:16of these guys,
28:17I'm thinking
28:17we're probably
28:18a little later
28:19in the 19th century,
28:20more towards
28:22about 1850.
28:23What tragic fate
28:24befell this vessel?
28:25Here's hoping
28:26we can learn more
28:27as Noah continues
28:28to investigate.
28:29Either way,
28:30it's in good company.
28:31The Gulf is home
28:32to many such
28:32mysterious vessels.
28:34This is the
28:34Oceanus Explorer.
28:35We are now
28:36on the seafloor.
28:37This is dive 12
28:38from the northern
28:39Gulf of Mexico.
28:39We are diving
28:40on the shipwreck.
28:41Number 19,
28:42a deadly undersea lake.
28:44So there's a dead
28:45amplifier.
28:45That's what we mean
28:45by the jacuzzi of despair.
28:47We generally think
28:48of all water
28:49within a given space
28:50as being homogenous,
28:51but variables
28:52like temperature
28:53and the salinity levels
28:54can create entirely
28:55distinct sections,
28:57like lakes in oceans.
28:58The jacuzzi
28:59or sometimes hot tub
29:01moniker is because
29:02it's warmer
29:02than the nearby
29:03four degrees Celsius
29:04ocean water.
29:05During return visits
29:06in 2015,
29:07researchers recorded
29:08temperatures from
29:097.8 up to
29:1019 degrees.
29:11At the bottom
29:12of the Gulf of Mexico,
29:133,300 feet below
29:14the surface of the ocean,
29:16researchers have found
29:17just such a body of water.
29:1912 feet deep
29:19and roughly 32 feet across,
29:21this undersea lake
29:22might be small,
29:23but it certainly
29:24packs a punch.
29:25Dubbed the jacuzzi
29:26of despair,
29:27it kills any sea creature
29:29foolish enough
29:30to test its depths.
29:31Spending too long
29:32in it can send
29:33an eel into toxic shock.
29:36This highly salinated
29:37water, rich in methane
29:38and hydrogen sulfide
29:39is seriously toxic.
29:42Little is understood
29:43about the surreal
29:43undersea environment,
29:45but researchers think
29:46it might give us insight
29:47into the conditions
29:48on extraterrestrial planets.
29:50Number 18.
29:51Julia Sound.
29:53Recorded in 1999,
29:55Julia is the name
29:56given to a mysterious sound
29:57picked up by the
29:58U.S. National Oceanic
29:59and Atmospheric Administration.
30:00It only lasted 15 seconds,
30:10but it captivated
30:10the scientific community
30:11and amateur theorists alike.
30:13What's that sound?
30:15Noah suggested
30:16that it most likely
30:17originated from an iceberg
30:18colliding with the landmass
30:19of Antarctica,
30:20but this cannot be proven.
30:22What we do know
30:23is that it was loud enough
30:24to resonate across
30:25a massive section
30:26of the ocean.
30:27Those willing to consider
30:28more out-there possibilities
30:29have suggested
30:30it could be the sound
30:31of a massive unknown creature.
30:33Rumors abound
30:34about NASA satellite photos
30:36showing a huge shadow
30:37moving in the waters
30:38off of Antarctica
30:39around that time,
30:40but no such images
30:41have surfaced.
30:42Number 17,
30:49Adam's Bridge
30:50Rama Satu,
30:52also known as
30:52Adam's Bridge,
30:53is a series of
30:54limestone shoals
30:55that form a rough connection
30:56between the northwest coast
30:58of Sri Lanka
30:58and Pambun Island
31:0030 miles away.
31:01The history of Rama Satu
31:03is intertwined
31:03with local legend.
31:05According to Hindu lore,
31:06it was built by an army
31:07of warrior monkeys
31:08known as Vanara
31:09to help the god Rama
31:10save his wife Sita
31:12from the demon king Ravana.
31:14While this origin story
31:15is widely treated
31:16as myth
31:16rather than reality,
31:17there are those
31:18who assert
31:19that Adam's Bridge
31:19was in fact built
31:21and was never
31:22a naturally occurring
31:23land bridge.
31:24An American science channel
31:25has made startling
31:26revelations
31:27that the Rama Satu Bridge
31:28commonly called
31:29the Adam's Bridge
31:29connecting India
31:30and Sri Lanka
31:31is man-made
31:31and not natural.
31:33All we know for sure
31:34is back in the 15th century,
31:36it was entirely above
31:37sea level
31:37and traversable.
31:39How these stones
31:40got here
31:40is a mystery.
31:42And when a team
31:44of geologists
31:44date the stones,
31:46the mystery deepens.
31:48Number 16.
31:49Macropinna microstoma.
31:50Macropinna is a small
31:52dark fish
31:52with large fins,
31:54a tiny mouth
31:55and a remarkable
31:56pair of eyes.
31:57Think that's a weird name?
31:58Wait till you see
31:59the fish it belongs to.
32:01First discovered in 1939,
32:03this mysterious
32:04and thoroughly alien-looking
32:05creature
32:05wasn't photographed alive
32:07until 2004.
32:08The fish discovered alive
32:10by the Monterey Bay
32:11Aquarium Research Institute
32:12is the first specimen
32:14of its kind
32:15to be found
32:16with its soft,
32:17transparent dome intact.
32:19It spends its life
32:20at depths
32:20between 2,000
32:21and 2,800 feet.
32:23And though it has been
32:24caught a number of times
32:25over the years,
32:26its fragile anatomy
32:27has made it incredibly
32:28challenging to study.
32:29From the barrel eye family,
32:31Macropinna microstoma
32:32has a translucent domed head,
32:34which,
32:34coupled with its unique
32:35tubular eyes,
32:37gives it an advantage
32:38over its prey.
32:39When it spots food,
32:40it can rotate its eyes
32:41to look forward,
32:42to include its mouth
32:44in the field of view.
32:45The tubular eyes
32:46are extremely well-suited
32:47for capturing light
32:48in its dark habitat,
32:49while its domed head
32:50allows it to not only
32:51look forward,
32:53but also up
32:53through its own head.
32:55Unique?
32:56Sure,
32:56but also super creepy-looking.
32:59Number 15.
33:00The Gulf of Khambat Ruins
33:02Discovered in the early 2000s,
33:04these alleged ruins
33:05are still generating
33:06controversy decades later.
33:08Located off the coast
33:09of Gujarat
33:10in the Gulf of Khambat,
33:11this archaeological site
33:12is seemingly made up
33:13of city-like structures
33:15and home to various artifacts.
33:17But because the area
33:18was dredged
33:19rather than being explored
33:20via more careful
33:21methods of excavation,
33:22the scientific community
33:23is divided
33:24as to the significance
33:25of the results.
33:26The structures
33:27are compelling,
33:28but the relevance
33:29of the carbon-dated materials
33:30from the site
33:31is hotly debated.
33:32If they are indeed
33:33the tools
33:34of an ancient settlement
33:35dated at 9,500 years old,
33:37that would make
33:38the Gulf of Khambat Ruins
33:39the oldest known civilization.
33:41Number 14.
33:43Australia's Cannibal Shark
33:44Just as lions
33:45rule the savannah,
33:46great white sharks
33:47rule the seas.
33:49Okay,
33:49technically,
33:50killer whales
33:50have been known
33:51to target them,
33:52but that's not
33:53what happened here.
33:53Australian scientists
34:03were shocked
34:03and utterly perplexed
34:05when a 9-foot-long
34:06great white shark
34:07was apparently devoured.
34:09It had been tagged
34:10with a tracker
34:10as part of a study,
34:11and when said tracker
34:12washed up on shore,
34:14the data contained within
34:15showed a sudden spike
34:16in temperature
34:17followed by a staggering
34:181,900-foot dive.
34:20A temperature that could
34:21only be achieved
34:22inside the belly
34:24of another living animal.
34:26After careful investigation,
34:27the researchers were left
34:28with only one
34:29possible conclusion.
34:31It was eaten
34:31by a cannibal shark
34:32of the same species
34:33estimated to be
34:3416 feet long
34:35and 2 tons.
34:37Terrifying, right?
34:38While great whites
34:39tend to avoid conflict,
34:41cannibalism
34:41is not unheard of.
34:43Number 13.
34:44The Baltic Sea Anomaly
34:45In 2011,
34:47Swedish diving team
34:48OceanX
34:48was searching
34:49for sunken treasure
34:50in the Gulf of Bothnia.
34:52They stumbled instead
34:53upon something
34:53far stranger.
34:55Using sonar equipment
34:56to take a rough image
34:57of the object,
34:58they reported
34:58it was 200 feet
35:00in diameter
35:00and bore distinct
35:01design patterns
35:02that seemed unnatural.
35:04Adding to the mystery
35:05of the Baltic Sea Anomaly
35:06is the fact that,
35:07according to the team,
35:08there was electrical
35:09interference in the area,
35:10preventing them
35:11from getting a clearer image.
35:13It's definitely
35:13a very sharp edge
35:15and it,
35:16and,
35:17I haven't seen this before
35:19and when I just
35:21look at it now,
35:22it definitely
35:23looked like man-made.
35:24The team has even suggested
35:26that it could be a UFO.
35:28Needless to say,
35:28scientists are skeptical.
35:30Okay, that's sort of true.
35:31According to the
35:32Ocean Explorer team,
35:33it's not actually,
35:34obviously,
35:35a spacecraft.
35:35It's not even made of metal.
35:37It doesn't hurt, though,
35:38that the structure
35:38looks vaguely like
35:39the Millennium Falcon
35:40or Ebon Hawk
35:41from Star Wars.
35:43Number 12.
35:44Light Wheels
35:45in the Persian Gulf
35:46It's there, right?
35:47There's something there.
35:48We're starting to notice
35:49a pattern here.
35:50If you're on the hunt
35:51for an oceanic mystery
35:52of your very own,
35:54explore a gulf.
35:55Sometimes poetically
35:56referred to as
35:57ghosts of the ocean,
35:58light wheels
35:59are large glowing
36:00circles of light
36:01that appear on the water
36:02and have been observed
36:03for decades.
36:04Some reports
36:05actually go all the way
36:06back to the 18th century.
36:08Often measuring
36:08hundreds of feet
36:09in diameter,
36:10these eye-catching anomalies
36:11have been explained away.
36:12Most notably
36:13by oceanographer
36:14Kurt Kalla
36:14as the result
36:15of bioluminescent plankton
36:17and seismic waves.
36:18While plausible,
36:19such theories
36:20struggle to explain
36:21the variety of shapes
36:22that the light wheels take
36:23or the fact
36:23that they appear
36:24to spin
36:24at varying speeds.
36:26Number 11.
36:27The Milky Seas Effect
36:29Sailors' tall tales
36:42are often dismissed
36:43as mere superstition.
36:45Well,
36:45the Milky Seas Effect
36:46is one story
36:47that we can confirm,
36:49even if we don't
36:50entirely understand it.
36:51Historically,
36:52sailors have reported
36:53seeing large sections
36:54of the sea
36:54become a pale milky
36:55white or blue
36:56and emit a faint glow.
36:58Now,
36:59thanks to modern technology,
37:00we know that
37:01the Milky Seas Effect
37:02is not only real,
37:03but the result
37:03of bioluminescent bacteria.
37:05While that's all
37:06well and good,
37:07we still can't figure out
37:08what causes
37:08these sudden explosions
37:09in bacterial populations
37:11or the other variables
37:12that result
37:13in this unique sight.
37:14Number 10.
37:15Leftocephalus gigantus.
37:17Described by Anton Brun
37:18in 1930
37:19and Peter Henry John Castle
37:21in 1959,
37:22Leftocephalus gigantus
37:24is an extremely rare species
37:25of eel
37:26fought by some
37:27to swim the ocean depths.
37:29Only two such specimens
37:30have ever been studied
37:31and they were in the larval state,
37:33meaning that they were
37:34nowhere close
37:35to reaching maturity.
37:36But even as a larva,
37:37one specimen
37:38was roughly six feet in length.
37:40And given that eel larva
37:41is typically 1 32nd
37:43of its adult length,
37:44that would suggest
37:45a truly monstrous eel comaturity.
37:47Now, contemporary scientists
37:49have suggested
37:50that Leftocephalus gigantus
37:51was likely misidentified
37:53and would not grow
37:54substantially beyond that point.
37:56But without further study,
37:57it's impossible to say.
37:59Leftocephalus gigantus
38:00could be the reality
38:01behind sea serpents.
38:03Number 9.
38:04The Aegean Sea Ruins.
38:05In 2015,
38:07researchers hailing
38:07from Greece and Sweden
38:09made one of the most remarkable
38:10archaeological discoveries
38:11of the 21st century.
38:13Working south of Athens
38:14in the Colada Bay,
38:15the team was exploring
38:16fertile territory,
38:17the area is rich
38:19in archaeological sites.
38:20But nothing could have prepared them
38:21for what they found.
38:23What began with a few
38:24pottery fragments
38:25led researchers
38:25to uncover the ruins
38:26of an entire lost city,
38:28one that occupied
38:29somewhere in the ballpark
38:30of 12 acres of land.
38:32The city dates back
38:33to the Bronze Age
38:34and was seemingly protected
38:35by a wall
38:36complete with defensive towers,
38:38structures unseen until now
38:40in any other
38:40ancient Greek sites.
38:42How this seemingly
38:43once great city fell,
38:44however,
38:45is anyone's guess.
38:46This terrifying deep-sea beast
38:54was first discovered
38:55in 1925,
38:56and its existence
38:57admittedly lends
38:58a certain credibility
38:59to all those myths
39:00about sea monsters.
39:02Because colossal squids
39:03are so elusive,
39:04our knowledge of their anatomy
39:05is somewhat limited.
39:06But based on beaks
39:07that have been recovered,
39:08it's been hypothesized
39:09that at maturity,
39:10they could weigh up to 1,500 pounds
39:13and measure 30 to 33 feet
39:15in length.
39:16Steve was expecting
39:17the squid to be
39:18more than 30 feet long.
39:20It's only half that.
39:22Only a handful of specimens
39:23have ever been found,
39:24which makes sense
39:25given that they generally
39:26inhabit the Antarctic Ocean
39:28and dwell at depths
39:29of up to 7,200 feet.
39:31As if the colossal squid's size
39:32wasn't intimidating enough,
39:34they're armed with both
39:35swiveling and three-pointed
39:36hooks on their limbs.
39:37Number 7.
39:39The Ruins of Dwarka
39:40The Lost City of Dwarka
39:42is one of the rare instances
39:43of a myth
39:44possibly being confirmed as fact.
39:46According to legend,
39:47the Hindu deity Krishna
39:48founded the now-legendary
39:49city of Dwarka long ago.
39:51The city is sacred
39:52in the Hindu faith
39:53and is said to have been
39:54unparalleled
39:55in its beauty and splendor,
39:56rich in greenery,
39:58wildlife, and palaces.
39:59They found some walls
40:01and they found some stuff
40:02that carbon dates
40:0332,000 years ago.
40:05It was utopia,
40:06that is,
40:07until it was swallowed up
40:08by the sea.
40:09The Dwarka of legend
40:10has understandably
40:11long been dismissed
40:12as a work of fiction,
40:13but in the 1980s
40:15with the discovery
40:15of underwater ruins
40:16off the coast
40:17of the modern-day
40:18coastal town of Dwarka,
40:19people were forced
40:20to reconsider that assumption.
40:22The research continues
40:23to this day.
40:24Number 6.
40:25The Bimini Road
40:26Gentlemen,
40:27I propose
40:28that we find Atlantis,
40:30find that power source,
40:32and bring it back
40:32to the surface.
40:33Dubbed the road
40:34to Atlantis.
40:35The Bimini Road,
40:36or Bimini Wall,
40:37as some would argue,
40:38is a rock formation
40:39that runs for half a mile
40:40underwater in the Bahamas.
40:42Located near North Bimini Island,
40:44this mysterious marine landmark
40:45is made up of large,
40:46roughly rectangular
40:47limestone blocks,
40:49which seem to form
40:49a road or wall-like pattern.
40:51If you look at the Bimini Road,
40:52the sand on one side,
40:53the sand on the other side,
40:54and there's a clear,
40:55defined pathway.
40:56Analysis of the stones,
40:57including carbon dating,
40:59has led researchers
41:00to conclude
41:00that the Bimini Road
41:01is a natural formation
41:03resulting from erosion
41:04and the currents.
41:05But given that there are
41:06two other similar patterns
41:08in the area,
41:08and considering the fact
41:10that some of the stones
41:10appear to be stacked
41:11atop one another,
41:12there are some who maintain
41:14that there's more
41:14to the Bimini Road
41:15than carbon dating suggests.
41:17Bimini Road
41:18has been dated
41:18at around 2,000
41:20to 4,000 years old.
41:22Too young to be
41:22a part of Atlantis,
41:23but again,
41:24the accuracy of carbon dating
41:26is admittedly questionable.
41:28Number 5.
41:29The Cascadia Margin
41:30This subduction zone
41:31on the west coast
41:32of the United States
41:33is notable
41:33for a bizarre
41:34yet fascinating
41:35biological happening.
41:36I've got every light on.
41:39Oh, beautiful.
41:40The greenhouse gas methane
41:41seeps from the seafloor
41:43and rises through
41:44the sea column.
41:45Though it rarely
41:45reaches the surface,
41:47this is unusual
41:48tectonic activity
41:49which creates unique
41:50ecosystems within the region.
41:51Smile.
41:55While the lack of oxygen
41:57and presence of chemicals
41:58could prove toxic,
41:59the area's creatures
42:00have learned
42:01to adapt and thrive.
42:02But on a more
42:03unsettling note,
42:04the methane present
42:05in the Cascadia Margin
42:06could vent more easily
42:08as the oceans warm,
42:09a shift that would
42:10contribute to climate change.
42:12Number 4.
42:13Bloop
42:13The Julia recording
42:15certainly made waves
42:16in the scientific community.
42:17But if there's one
42:18deep-sea sound file
42:19that people never seem
42:20to get tired of debating,
42:21it's the Bloop.
42:22And it's not just
42:28scientists versus
42:29conspiracy theorists.
42:30Not even researchers
42:31within relevant fields
42:32seem to be able
42:33to agree about its origins.
42:34There were occasionally,
42:37rarely,
42:38but occasionally,
42:40there were sounds
42:41that we just could not identify.
42:43This ultra-low-frequency,
42:45high-amplitude sound
42:46was recorded in 1997.
42:48First, it was speculated
42:49that the sound
42:50was caused by icebergs
42:51dragging along the ocean floor.
42:52But then in 2002,
42:54Christopher Fox
42:55of the National Oceanic
42:56and Atmospheric Administration
42:57speculated that
42:58it had been produced
42:59by an animal.
43:00Flash forward another 10 years,
43:02and the NOAA was once again
43:03pointing towards ice quakes.
43:05Number 3.
43:06The Megalodon
43:07Human history
43:14across various cultures
43:15is chock full of myths
43:17and legends
43:18about sea monsters
43:18that tormented
43:19sailors of yesteryears.
43:21Unlike the Leviathan
43:22or the Kraken, however,
43:23we know for a fact
43:24that the Megalodon
43:25once swam these seas.
43:27The word Megalodon
43:28literally means big tooth.
43:30And these 7-inch teeth
43:31are almost all that remain
43:32of this extraordinary creature.
43:35No skeletons
43:36have ever been found.
43:38Measuring up to 59 feet
43:39in length
43:39and reaching upwards
43:40of 59 metric tons,
43:42these prehistoric terrors
43:43certainly earn the name.
43:45The general scientific consensus
43:46is that they went extinct
43:48millions of years ago,
43:49but there are those
43:50who believe
43:50they continue to survive
43:51in secret.
43:52And it's not just
43:53Discovery Channel
43:54fueling the speculation.
43:55Species like the coelacanth
43:57and megamouth shark
43:58remind us that anything
43:59could lurk
43:59in the ocean depths.
44:01Number 2.
44:02The Lost Submarines
44:03of 1968
44:04Life aboard a submarine
44:06isn't for the faint of heart.
44:08You're literally trapped
44:09in a long metallic cylinder
44:10hundreds of feet
44:11below the surface
44:12of the ocean.
44:13When something goes wrong,
44:14it often goes very wrong.
44:21Despite the inherent risks,
44:22however,
44:23four such vessels
44:24going missing
44:25in quick succession
44:26makes for
44:27an incredible coincidence.
44:29With 318 lives
44:30and four subs
44:31lost in a single calendar year,
44:331968 is the most deadly year
44:35in submarine history
44:37since the end of World War II.
44:38The USS Scorpion,
44:40the INS Dakar,
44:41the Minerv,
44:42and the K-129
44:43hailing from the States,
44:45Israel, France
44:46and the Soviet Union
44:47respectively,
44:47all disappeared
44:48under mysterious circumstances
44:50and continue to be
44:51the subject of speculation
44:52decades later.
44:54Before we continue,
44:55be sure to subscribe
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45:09Number 1.
45:10The Bermuda Triangle
45:11Roughly defined
45:13by Puerto Rico,
45:14Miami,
45:14and the island of Bermuda,
45:16this triangle
45:16is the subject
45:17of much superstition.
45:18Using the terminology
45:20of today,
45:20you would call
45:21the triangle?
45:22Well, I mean,
45:23you know,
45:23this is the oldest
45:23fake news story
45:24in the world.
45:25For the record,
45:26this is among
45:26the most heavily traveled
45:28stretches of ocean
45:28in the world,
45:29and most trips
45:30are completed
45:31without incident.
45:32But the accidents
45:33and disappearances
45:34that have transpired
45:35are notably strange.
45:37The Ellen Austin incident
45:38allegedly saw
45:39not one,
45:40but two crews
45:41disappear from
45:41a derelict ship
45:42found in the triangle.
45:43The USS Cyclops
45:45was a U.S. Navy ship
45:46that disappeared
45:46with all 309 sailors.
45:49There are countless
45:49such stories,
45:51leaving an enduring
45:51shroud of mystery
45:52over these stormy seas.
45:54Ships that have
45:54shown up
45:55absolutely empty,
45:57no sign of any struggle,
45:58and yet the crew
45:59is just banished.
46:00Which mysteries
46:00of the deep
46:01do you hope
46:02get solved soon?
46:02Let us know
46:03in the comments below.
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