All language subtitles for The UnXplained S04E03 What Lies Below 1080p HULU WEB-DL AAC2 0 H 264-playWEB_track3_[eng]

WILLIAM SHATNER:
Massive structures

lost beneath the waves
for thousands of years.

Sunken continents

that were home
to advanced civilizations...

...and a remote mountain lake
filled with gold treasure.

For as long as
man has roamed the Earth,

we've also explored
the world's oceans

in order to find out
what lies below.

Is the planet's vast underwater
world hiding profound secrets

in the silent expanse
of cold and darkness?

What can the depths of the sea
tell us about our human nature

and perhaps
a lost human history?

Well, that is what
we'll try and find out.

♪ ♪

Billionaire and underwater
explorer Victor Vescovo

boards an advanced
deep-sea submersible

known as the Limiting Factor

known as the Limiting Factor
and descends underwater.

and descends underwater.

His mission is to explore
the Challenger Deep,

an underwater valley that is
the deepest point on the planet.

VICTOR VESCOVO:
I was the fourth person to dive

to the bottom
of Challenger Deep.

Within the first
thousand meters,

it goes from being brilliant
sunshine in the Pacific

to pretty much fully black.

So you descend in the water
column, as we call it,

for up to four hours,

steadily going down, watching
that depthometer creeping,

steadily going down, watching
that depthometer creeping,
creeping, creeping.

creeping, creeping.

creeping, creeping.
And you get to the bottom
and then you

And you get to the bottom
and then you

check in with the surface,
tell them that you're ok.

(cheering)

At that point, it takes seven
seconds for the transmission

to actually get to the surface

and seven seconds
for it to go down.

It's such an incredible
feeling of relief

and a sense of incredible
achievement that,

and a sense of incredible
achievement that,
"Oh, my gosh,
we actually did it."

"Oh, my gosh,
we actually did it."

JOSH YOUNG:
Challenger Deep

is the most deep, dark and
dangerous place on the planet.

When you get to the bottom,
the pressure is

the equivalent of having

the equivalent of having
200 747s
stacked on top of you.

200 747s
stacked on top of you.

200 747s
stacked on top of you.
Unimaginable
crush pressure there.

Unimaginable
crush pressure there.

You need a properly
engineered submersible

that can go down,
withstand the pressure,

stay down there,

and continue
to explore these depths.

MONTY HALLS:
To get to these locations,

it's an extraordinary
undertaking

it's an extraordinary
undertaking
and it should be celebrated.

and it should be celebrated.

They are incredibly
difficult to get to,

they're extremely dangerous,
they're very hostile to people.

We don't belong down there.

SHATNER:
The ocean is a vast expanse

that is almost
unimaginable in scope.

And although humans
have been traveling

across the high seas
for thousands of years,

we still only know
a fraction of what lies

beneath the waves.

VESCOVO:
The most important
thing I think

I try to get people to realize
is that the ocean is big.

I try to get people to realize
is that the ocean is big.
I mean, really big.

I mean, really big.

Bigger than you can
put your head around.

Bigger than you can
put your head around.
It is 70% of planet Earth.

It is 70% of planet Earth.

And it's three-dimensional.

It's not a two-dimensional
surface like the land is.

And so, 80% of it
is still completely

unmapped and unexplored.

HALLS:
The deep sea

remains the last great frontier

remains the last great frontier
for us as a species.

for us as a species.

We know way more about
the surface of the Moon,

way more about the surface
of the other planets

than we do the deepest spots

in the ocean.

It's a mystery we've just
started to unravel.

YOUNG:
The allure of the deep sea
is that it holds something

YOUNG:
The allure of the deep sea
is that it holds something
in everyone's imagination.

in everyone's imagination.

Not fully knowing what is there

enables everyone to come up
with their own vision

of what might be there.

What creatures
might live down there?

Might there be
sunken ships and gold,

and where might that be?

That is what
sparks the curiosity

that we need to keep exploring

and to keep investigating
what's down there,

what's out there.

SHATNER:
The recent dives
to the bottom of the ocean

have shed new light into
the darkness of its depths.

But these voyages are just
the latest chapter in mankind's

long quest to uncover what
secrets are held in the seas.

In fact, our fascination
with the ocean

goes back thousands of years.

LYNNE McNEILL:
Throughout history

and cross-culturally as well,

we see a really consistent
pattern of belief

that under the water
is an entirely other world...

...full of creatures

like a Kraken or a Leviathan.

And it's not just oceans.

Lakes are always populated
with these monstrous creatures,

like the Loch Ness Monster.

The message we get

is that no body
of water is safe.

MICHAEL TUTTLE:
The understandings of the seas
and oceans over time

MICHAEL TUTTLE:
The understandings of the seas
and oceans over time
has changed dramatically.

has changed dramatically.

The ocean was basically seen

by seafaring people,
like the ancient Greeks were

or ancient Phoenicians were...

...as the big, bad black sea.

They didn't have the ships

to go against
the currents and the winds.

And if you sailed
far enough, you'd die.

ROBERT SCHOCH:
For so long, no one really knew

what the extent of the oceans
were, what's under them.

Even in the time of Columbus,
late 15th century,

people were worried,

some people thought
the Earth was flat,

that you could literally
get to the end of the ocean

and fall off the edge.

SHATNER:
Humanity has always been humbled
by the vast power of the ocean.

But during the scientific
revolution in the 16th century,

we started to get
a better understanding

we started to get
a better understanding
of the underwater world.

of the underwater world.

In 1521, Portuguese explorer
Ferdinand Magellan

attempted to measure the depth
of the ocean by attaching a line

to a cannonball and tossing it
over the side of his ship.

After lowering
the cannonball 2,400 feet,

Magellan declared that
the ocean was immeasurably deep.

Magellan went out and tried to
measure the depth of the oceans.

He wasn't largely
successful with that,

but it sort of opened
the door that,

but it sort of opened
the door that,
wow, this is really deep

wow, this is really deep

and we need to do
more exploration.

That was furthered later

with the HMS Challenger
expedition in the 1870s

that went all the way
around the world

that went all the way
around the world
to explore the deep oceans.

to explore the deep oceans.

And the most significant thing
it found was the deepest part,

which is the Challenger Deep,

which was named
after the expedition.

Over time there became more
of a curiosity to the oceans.

To want to go down
and to be able to go down to,

to see what was there.

SHATNER:
In the 20th century,

the development
of undersea submersibles

ushered in a new era

of unprecedented
underwater exploration.

YOUNG:
The evolution of a deep
ocean submersible started

in 1930 when
a bathysphere was created,

where a man was put inside
of a, essentially, a vessel...

...and dipped down into
the ocean held by a tether.

That was furthered later

by the bathyscaphe in 1960,

the Trieste, which took
Don Walsh and Jacques Piccard

to the bottom
of the Challenger Deep

for the first time ever.

SHATNER:
Today, underwater
archaeologists and explorers

are using the latest
submersible technology

to try to unravel
the mysteries that lie

to try to unravel
the mysteries that lie
within the ocean.

within the ocean.

And many experts believe

that they are on the cusp
of making dramatic

new discoveries on the seafloor.

VESCOVO:
My hopes for ocean
exploration in the near term

is to bring
the very deep places,

the very dangerous places
to a point of accessibility

where we can take any
scientists down to them

to explore them.

Also, there's a huge
project underway

Also, there's a huge
project underway
called the 2030
Seafloor Initiative,

called the 2030
Seafloor Initiative,

where a bunch
of different scientists

where a bunch
of different scientists
and people like myself,

and people like myself,

we're trying to help
map the seafloor.

SHATNER:
The Seabed 2030 Initiative

is gathering information
collected all over the world

by science vessels,

merchant ships,
and underwater drones.

Their goal is to map
the entire ocean floor

by the year 2030,
a feat that seemed impossible

for most of human history.

VESCOVO:
Technology is always the key.

VESCOVO:
Technology is always the key.
Technology allows us

Technology allows us

to do things that we
couldn't do before

and see those things that
no one has ever seen before.

It's human progress

and really pushing ourselves
to the next level.

It's really quite extraordinary
that we have the ability

to journey to the very
bottom of the ocean,

and scientists are making

incredible underwater
discoveries all the time.

For instance, a new landmass
was recently found

For instance, a new landmass
was recently found
off the coast of New Zealand.

off the coast of New Zealand.

And there are those
who believe that it could be

And there are those
who believe that it could be
part of a lost continent.

part of a lost continent.

SHATNER: A team of
geologists at GNS Science

announce a major discovery

related to the Earth's
continents,

the vast landmasses that
make up the planet's surface.

The scientists found that,

in addition to
the seven continents

that humans have
known about for centuries,

that humans have
known about for centuries,
there's also
an eighth continent

there's also
an eighth continent

located directly
underneath New Zealand,

which they named Zealandia.

Zealandia sank into the ocean

approximately
50 million years ago,

and its existence suggests

that there may be even
more lost continents

that were swallowed up
by the sea.

The Earth has cycles of sea
level rise and sea level fall.

Over the last hundreds
of millions of years,

as climate has warmed
we get sea level rise;

cold periods, sea level fall.

There's a huge amount
of land which is now

There's a huge amount
of land which is now
covered by the sea.

covered by the sea.

covered by the sea.
MICHIO KAKU:
10,000 years ago,

MICHIO KAKU:
10,000 years ago,

with the end of the Ice Age,

sea levels were dramatically
lower than they are now.

And because of the melting

of the ice, sea levels
have risen since then,

and cities that may have existed
thousands of years ago

could be lost in history
as a consequence.

SHATNER:
For thousands of years,
cultures from around the world

have told stories about
long-lost continents

that were home
to human civilizations

and are now submerged
beneath the waves.

Perhaps the most famous
is the legend of Atlantis,

a massive island that was home
to an advanced civilization

before it supposedly sank into
the ocean after an earthquake.

HUGH NEWMAN:
There's been more books
written about Atlantis

than any other
lost continent in history.

There are many

sunken cities, lost lands,

destroyed continents
all around the planet

destroyed continents
all around the planet
in legend and history.

in legend and history.

For example, we have
the lost land of Hy-Brasil,

which was thought to be

200 miles off the coast
of Ireland,

and it was even on maps
until the 1800s.

SHATNER:
One of the most intriguing
lost continents is a landmass

that is believed to have once
existed in the Pacific Ocean.

A mythical land
that is known as Mu.

The first person
to write extensively

about the lost continent of Mu

was a Scottish writer

by the name of James Churchward.

In the 19th century,
he was in India when he visited

a monastery.

And the monks there had records,
apparently, tablets

that referred to
this place called Mu

that was this huge continent
that supposedly existed

from Hawaii in the north

down to Easter Island
in the southeast,

right the way across
to Micronesia in the west.

And the people there were
supposedly called the Naacal.

The continent of Mu thrived
perhaps 50,000 years ago

and was sunk beneath the waves,

possibly at the end
of the last Ice Age.

My great-grandfather
James Churchward,

eventually he became friends
with the rishi of the temple

that he visited in India.

And the rishi mentioned
that he was a member

And the rishi mentioned
that he was a member
of the Naacal brotherhood,

of the Naacal brotherhood,

the holders of wisdom
and knowledge

of the lost continent of Mu.

They were mighty
navigators and sailors

and established civilization
in other parts of the world.

SHATNER: According
to James Churchward,

SHATNER: According
to James Churchward,
the Naacal civilization
had a population

the Naacal civilization
had a population

of more than 60 million
people at its peak

before a massive volcanic
cataclysm caused Mu to vanish

before a massive volcanic
cataclysm caused Mu to vanish
beneath the waters.

beneath the waters.

So far, no evidence
of the lost continent

has been found
on the ocean floor.

But some researchers
claim that, incredibly,

a tiny remnant of Mu may still
exist above water today

on an island located in a remote
part of the Pacific Ocean.

Roughly 2,500 miles
northeast of Australia

lie the ruins of a once
great ancient city.

Nan Madol.

Nan Madol is a complex
of man-made islands

built with massive stone
blocks that float atop

built with massive stone
blocks that float atop
a submerged coral reef.

a submerged coral reef.

COLLINS:
So as you approach Nan Madol,

there are a series of islands,

and they're built
actually on coral,

the only place in the world
where this actually occurs.

And you've got all these
incredible structures

made of these prismatic blocks.

NEWMAN:
At Nan Madol, you have these

ridiculous basalt columns,
they're huge,

some of them up to,
like, 40 tons,

some of them up to,
like, 40 tons,
even more in some cases.

even more in some cases.

Some of them are raised
very high up in the air,

on the very top levels.

So there's a real problem when
it comes to try and understand

how they moved these millions
of tons of basalt columns.

COLLINS:
One of the biggest mysteries

surrounding Nan Madol

is that nobody really knows
who constructed it.

But there's some
very strange stories

about how the city
came into existence.

For instance,
one of the stories talks about

it being constructed
by so-called master builders...

...turning up
and using a magical force...

...to raise the blocks into
the air and put them into place,

almost as if they could
levitate these blocks.

SCHOCH:
Some people actually suggested

that maybe Nan Madol
was the last remnant of Mu

that was still above water...

...and it was simply

...and it was simply
indicative of what had sunk

indicative of what had sunk

beneath the waves from
this advanced civilization.

Nan Madol is in Micronesia,

so it fit the correct
general area.

And this is one reason people
thought in terms of Mu.

NEWMAN:
When it comes to looking
for this lost continent of Mu,

places like Nan Madol
really do suggest

there could be much more
down there than we realize

on the bottom of the ocean.

It's hard to picture
an entire continent,

with people living on it,
simply vanishing into the sea.

with people living on it,
simply vanishing into the sea.
And yet...

And yet...

...all over the world,
there are legends of lost

civilizations that were
swallowed up by the oceans.

But could such legends
actually be true?

Perhaps the answer
can be found by examining

a mysterious structure
located in the Pacific Ocean

a mysterious structure
located in the Pacific Ocean
that has come to be known as

that has come to be known as

Japan's Atlantis.

SHATNER: At the western end
of the Pacific Ocean,

67 miles off the coast
of Taiwan,

is the Japanese island
of Yonaguni.

It is one of some
6,800 landforms

It is one of some
6,800 landforms
in the Japanese archipelago,

in the Japanese archipelago,

in the Japanese archipelago,
a chain of small islands

a chain of small islands

located near the southern
tip of Japan.

But just off the coast
of Yonaguni lies

a mysterious complex
of underwater stone formations

known as the Yonaguni Monument.

SCHOCH:
It's an absolutely
incredible structure,

and it looks like
a giant staircase.

Steps in the bedrock
with terraces.

The symmetry and the regularity
that people see on it

just makes
a astounding impression.

NEWMAN:
It looks like a huge,
multifaceted pyramid platform

that stretches over a huge area

with all these details
carved into it.

There's areas where monoliths
were said to have been standing.

There's even dolmens
or large slabs like lintels

covering areas and creating
doorways and other features.

HALLS:
When you look at some
of the rock structures,

it looks undeniably man-made.

But with that comes
a whole series of questions.

How did it get here?
How long has it been here?

What is the structure
you're looking at?

SHATNER:
The Yonaguni Monument was
discovered by divers in 1987,

SHATNER:
The Yonaguni Monument was
discovered by divers in 1987,
and since that time,

and since that time,

experts have debated whether
it's a natural formation

caused by erosion
or an artificial structure

that was carved by man
in the distant past.

Researchers who believe
that the monument is man-made

Researchers who believe
that the monument is man-made
claim that it is the ruins

claim that it is the ruins

of a massive stepped
pyramid complex

that is nearly 500 feet long,
130 feet wide, and 90 feet tall.

The Yonaguni Monument
was originally above water,

but at some point in the past,

but at some point in the past,
waters rose up and covered it

waters rose up and covered it

and it's now beneath
almost 100 feet of water.

You have not only these
geometrical structures,

these terraces,

but also some strange monuments,

including what appears to be
this human head.

It's 23 feet tall

and it has these
hollow sunken eyes.

It almost looks like the moai
statues of Easter Island.

It looks hauntingly like

some kind of giant of the past.

SHATNER:
Underwater archaeologists
who have visited Yonaguni

have also noted that
there appears to be

a sculpture of a sea turtle.

And some even claim
there is a carved roadway

circling the entire site.

NEWMAN:
There's so many elements to it

which suggest it's at least
been manipulated by man,

because it looks like it's been
carved from solid rock.

And one of the theories
that has kind of caught

many researchers' attention
is that it could be evidence

of a lost civilization
many thousands of years old.

SCHOCH:
Some people have
thought of Yonaguni

being "Japan's Atlantis,"

in the sense that if
Yonaguni is an artificial,

human construction
from very ancient times,

it must represent the tip
of the proverbial iceberg

of an advanced civilization

thousands of years ago
that somehow disappeared

into the ocean under the waves.

SHATNER:
Is the Yonaguni Monument

SHATNER:
Is the Yonaguni Monument
the remains
of a lost civilization?

the remains
of a lost civilization?

And if so, how long ago
did that civilization exist?

HALLS:
One of the really,
really interesting,

mystifying things
about the Yonaguni Monument

is the depth of water.

is the depth of water.
So, it's 25 meters.

So, it's 25 meters.

Now, if we were relying
on the pulses of sea level rise

from kind of the end
of the Ice Age

10,000 years ago, that means
that the Yonaguni Monument

would be 12,000
to 14,000 years old.

That's going to predate

the earliest civilizations
we know of by 7,000 years or so.

If the Yonaguni Monument was
man-made, then it is a truly

seismic discovery in terms

of the history of
our species because,

potentially, the cradle of human
civilization was Japan,

potentially, the cradle of human
civilization was Japan,
was off the coast of Japan.

was off the coast of Japan.

SHATNER:
Is it possible that
the Yonaguni Monument

is not only man-made

but also much older
than any other ruin

but also much older
than any other ruin
that's ever been discovered?

that's ever been discovered?

that's ever been discovered?
Many scientists believe

Many scientists believe

that further research
on this remarkable structure

could rewrite history

and offer tangible evidence
in support of the theory

and offer tangible evidence
in support of the theory
that there are remnants of lost

that there are remnants of lost

civilizations hidden
in the world's oceans.

TUTTLE:
Are there some
foundational cities

underneath the water?

I wouldn't bet against it.

If we want to unlock the secrets
of ancient civilizations,

we may very well
have to look underwater.

HALLS:
What we are beginning to learn

is the huge potential of

mysteries in the sea, as in
what the sea can give us

in terms of new discoveries,
new glimpses into other worlds.

And the Yonaguni Monument
is a real manifestation of that.

The mere possibility

that the ruins of
an ancient civilization

could be lying on the floor
of the Pacific Ocean

is fascinating.

But our next underwater mystery
can be found not in the ocean

but at the bottom
of a vast lake.

A lake that holds gold and
silver artifacts that date back

thousands of years.

SHATNER: High atop this
5,500-mile-long mountain range

lies Lake Titicaca,

one of the most picturesque
bodies of water in the world.

Lake Titicaca sits
at a remarkable elevation

of 12,500 feet, which is roughly
two miles above sea level.

REINHARD:
Lake Titicaca is a massive lake

REINHARD:
Lake Titicaca is a massive lake
in the midst
of a mountain range,

in the midst
of a mountain range,

and it's about 120 miles long

and 30-some miles wide.

It extends down
nearly a thousand feet,

and it's the highest
navigable lake in the world.

It's quite unusual
to be on something

that looks like a sea
when you're on it

and see snowcapped peaks...
(laughs) surrounding it.

SHATNER:
You might think
that a lake located

at such a high and remote
location would have no traces

of human activity.

But what's incredible

about Lake Titicaca
is that, for decades,

archaeologists have been finding

mysterious gold
artifacts submerged

mysterious gold
artifacts submerged
within its icy waters.

within its icy waters.

FOERSTER: Excavations
of Lake Titicaca found

2,000 artifacts of gold,
silver, and pottery.

Normally, of course on land you
would find that, but to find it

in the lake was very
mysterious and surprising.

REINHARD:
There's more than
40-some carved stone boxes

that have been found.

Many of them have little
grooves in their sides,

which was where the ropes were

tied around them
so they wouldn't slip out

when they were being
lowered into the water.

Now, the exciting thing
about finding these boxes

with a lid is the kinds of finds
that were being made in them,

with a lid is the kinds of finds
that were being made in them,
such as a gold vase,

such as a gold vase,

such as a gold vase,
a gold medallion,

a gold medallion,

a gold medallion,
and gold feline figurines.

and gold feline figurines.

SHATNER:
But why would the ancient
peoples of this region make

a difficult trek to this lake
that is located atop

one of the least accessible
mountain ranges in the world

to leave so many gold artifacts

at the bottom of the lake?

This entire area of the Andes
is associated with the Inca.

And they are responsible
for many of the finds

that have been made
in Lake Titicaca.

The Inca were
a South American civilization

that controlled 2,500 miles

stretching all the way
from Peru, modern-day Bolivia,

Guatemala into Chile
and Argentina.

REINHARD:
Lake Titicaca was one
of the most sacred places

REINHARD:
Lake Titicaca was one
of the most sacred places
in the entire Inca Empire.

in the entire Inca Empire.

It was sacred because it was

one of the most important
freshwater bodies of water

one of the most important
freshwater bodies of water
in all of South America.

in all of South America.

BELLINGER:
When the Inca realized
the incredible value

of the Lake Titicaca basin...

...they initiated a program
of religious pilgrimages,

essentially, saying that

their key creator god,
known as Viracocha,

rose up out of the waters
of Lake Titicaca

to create all humanity.

REINHARD:
Lake Titicaca

REINHARD:
Lake Titicaca
is the mythological origin

is the mythological origin

of the entire Inca Empire.

They believed that they were
descendants of the cultures

that had evolved
at Lake Titicaca.

There were legends
of temples and whatnot

underwater in Lake Titicaca,
long before the Incas.

SHATNER:
According to Inca legend,

a civilization that existed
centuries prior to them

rose from the waters
of Lake Titicaca.

Remarkably, archaeologists
have uncovered evidence

which suggests that there
may be some truth to this myth.

In August of 2000,
an Italian team of divers

uncovered traces
of a paved road,

a stone terrace,

and a wall nearly
a half a mile long.

BELLINGER:
They found themselves swimming
along what looked to be

BELLINGER:
They found themselves swimming
along what looked to be
an ancient paved roadway.

an ancient paved roadway.

And they passed what looked
like it could have been

terraced agricultural fields

quite similar
to what you can see

around the shores
of the lake even today.

But what they found
at the end of this road

really astonished them.

It was a giant temple complex,

It was a giant temple complex,
the size of two football fields.

the size of two football fields.

Archaeologists were able
to see that these were

extremely ancient,
1,000 to 1,500 years old.

REINHARD:
We found artifacts

dating from around 300, 400 AD,
until about 1100 AD.

And then you have the Inca
coming in around 1400 AD.

So that means that Lake Titicaca

was a sacred place
to civilizations

that dominated the Andes
before the Incas.

SHATNER:
The ruins found at the bottom
of Lake Titicaca would seem

to validate the Inca belief
that there was another culture

present there long before them.

But how did these ruins
become submerged?

SCHOCH:
We've got these
structures underwater.

They're 1,500 years old
or older.

It's one thing to find
artifacts underwater

and they may have been
dropped or may have been

purposefully, um, sacrificed
to the lake, if you would.

But when you find temples and
walls and roadways underwater,

But when you find temples and
walls and roadways underwater,
you know that
something was going on

you know that
something was going on

at a much earlier period.

Certainly they were not building
these things underwater.

We do know that Lake Titicaca
fluctuates in terms of

the water levels over time
over thousands of years.

So this is incredibly
important and fascinating

and it ties in with Inca beliefs

that they thought
this was a place

that was literally
the birthplace

of civilization for them,
up in the high Andes.

FOERSTER:
The enduring mysteries
associated

with Lake Titicaca would be,
for example, who was the first

civilization to live here?

We have no idea how far
back in time humanity goes

in terms of the first habitation
or inhabitation of this lake.

But that's why there should
be more underwater archaeology

done here in Lake Titicaca,

in order to be able to fully
comprehend the true history

of this amazing aquatic area.

What else might be submerged
at the bottom of Lake Titicaca?

Could there be other artifacts

that might change our
understanding of human history?

Well, the diving
expeditions continue,

as do the revelations.

But let's consider a different
kind of undersea discovery.

One that makes us
question not our past

but rather whether
we're alone in the universe.

SHATNER: 100 miles
off the coast of San Diego,

a group of U.S. warships
are conducting

routine training exercises

when they detect
a number of unidentified

flying objects
near Catalina Island.

They were picking up multiple
targets on the radar system,

but they had a new
system they were testing.

So the theory was
that it was just glitches,

and so they rebooted.

But sure enough,
these targets showed up again.

And this goes on
for a series of some days,

and then they vectored jets
to go and investigate.

SHATNER:
As Navy F-18 fighter jets
approach the area where the UFOs

had been detected on radar,

the pilots see a white,
oval-shaped object

that has no wings

and resembles a giant Tic Tac.

But then suddenly,

it rapidly descends 80,000 feet
in less than a second

and hovers above
the surface of the water.

Naval Officer Ryan Weigelt

was stationed
on the nearby USS Princeton

on the day of the encounter.

I was called
to the bridge by the CO

I was called
to the bridge by the CO
and when I got up to the bridge,

and when I got up to the bridge,

the whole office was much more
crowded and chaotic than normal.

People were raising their voice

on seeing some of the things
that they were seeing.

It was
a very excited atmosphere.

I noticed that
to my left-hand side

was a video monitor
where the FLIR footage

was being fed
into the Princeton,

so I could see
what the jets were seeing.

On my right-hand side

I am watching them
on a radar screen

that gives information
on altitude

and speed and heading and...

Seeing what I saw,

it's impossible for anything
that we own or have created

to withstand the G forces
that would be created

from doing any type of thrusts,

like what this Tic Tac
was doing.

Two of the pilots involved
in the Tic Tac incident,

Commander David Fravor

and Lieutenant Commander
Alex Dietrich,

have stated that under
the infamous Tic Tac,

there was an area of water
that was roiling,

as if there was this
object under the waves.

And this object was about

the size of a Boeing 737.

SHATNER:
Navy eyewitnesses

have reported that
the Tic Tac was moving

erratically above
the surface of the water,

as though it appeared
to be interacting

with the unidentified object
located beneath the waves.

Moments later, the Tic Tac

made a series of seemingly
impossible maneuvers

to evade the Navy jets
before accelerating away

to evade the Navy jets
before accelerating away
at thousands of miles per hour.

at thousands of miles per hour.

And the pilots claim that when
they tried to get a second look

at the underwater object,
it had somehow vanished.

I am a person who needs to see

to really believe and...

seeing what I saw
during that time frame,

I think any rational-minded
person would be somewhat alarmed

that there is this
technology out there

that is far superior to us.

POPE:
That technology
isn't something we have.

So, if not us, who or what?

And what we're hearing about now
is just the tip of the iceberg.

There have been consistently
a lot of reports

of unidentified objects
under the ocean.

People have seen them
from the shore,

going into the sea
and coming out of the sea.

We've all heard of UFOs because
they fly in our atmosphere,

but what happens if they can hit
the oceans and go underwater?

These are USOs.

These are USOs.
Unidentified submerged objects

Unidentified submerged objects

are objects that have
the ability to plunge

right into the ocean
and disappear.

This is something
that we cannot duplicate

with our technology,
and so these objects

are of very intense interest
because it means

that a new technology is being
harnessed by some unknown party.

They could be even,
perhaps, extraterrestrial.

SHATNER:
Extraterrestrial USOs?

Flying into and out of
the world's oceans?

For some, that may sound
like something

out of science fiction.

But curiously,

more than a decade after
the Tic Tac incident,

the United States Navy
continues to detect USOs

off the coast
of Southern California.

In July of 2019, Navy aircraft
flying in the same area

recorded video
which appears to show

an unidentified flying object
disappearing into the ocean.

POPE: What's really
interesting about this

is that all this is happening

in a fairly small
geographical area.

So you've got a series
of encounters

happening off the coast
of San Diego.

To have all this going on
in one very concentrated spot,

one has to say,
is this just a coincidence

or is there a connection?

SHATNER: If there are, in fact,
extraterrestrial USOs

SHATNER: If there are, in fact,
extraterrestrial USOs
lurking in this area,

lurking in this area,

then where are they hiding
when they go underwater?

Satellite imagery
reveals a strange

underwater formation
only six miles off the coast.

The three-mile-long anomaly
lies 2,000 feet

below the surface
of the Pacific Ocean,

and the discovery led
many to wonder

if this formation
might actually be

an artificial structure.

an artificial structure.
POPE:
A lot of people

POPE:
A lot of people

POPE:
A lot of people
got very excited
by this discovery.

got very excited
by this discovery.

It's really quite striking

and it really
does look artificial.

It looks like the thing's
got this huge flat roof.

It looks like it's got
pillars or columns.

It looks like it's got
pillars or columns.
And it makes you wonder,

And it makes you wonder,

is this the remains of
some ancient civilization

that's just hidden
by rising sea level?

Or is it, as some believe,
an extraterrestrial base?

KAKU: If all these objects
are buzzing our aircraft,

they must have
a base of operations.

But you see, if they
have a base of operations

as easily detected by us humans,

it would sort of defeat
the purpose of observing us.

So perhaps there's
an underwater base

that is away from
prying eyes of humans,

so that we don't interfere
with their plans.

That cannot be ruled out.

Is it really possible

there are
extraterrestrial spacecraft

lurking in the ocean, as members
of the U.S. military claim?

lurking in the ocean, as members
of the U.S. military claim?
As of now,
we can't say for sure.

As of now,
we can't say for sure.

But sometimes the ocean's
depths reveal evidence

which proves that
an incredible story is true.

which proves that
an incredible story is true.
Like off the coast of India...

Like off the coast of India...

...where archaeologists
rediscovered

the ruins of a mythical

underwater city.

SHATNER: Perched on the shore
of the Arabian Sea
♪ ♪

sits the modern city of Dwarka.

It was named
after a legendary city

It was named
after a legendary city
that was also called Dwarka.

that was also called Dwarka.

The sacred Hindu text
the Mahabharata

explains that the legendary
city of Dwarka

was said to be the dwelling
place of Lord Krishna

before it sank into the sea
following a fantastic

before it sank into the sea
following a fantastic
battle in the sky
between Krishna

battle in the sky
between Krishna

and another Hindu god
Lord Salva.

For centuries that story was
believed to be merely a legend.

That is, until 1983

when underwater ruins
were discovered off the coast.

Ruins which suggest that
the legendary city of Dwarka

was not a myth
but rather a real place.

RICHARD BATES:
S.R. Rao

was an archaeologist,
a marine archaeologist

working with the Archaeology
Institute in India.

And he started the exploration

from the shore
of present-day Dwarka.

And on the floor of the ocean,

on the seafloor
he found wall structures,

blocks three foot by three foot,
probably a foot thick,

stacked as if they were building
continuous wall structures.

They could be city walls,
they could be street,

building walls, um,
they could be walls of temples.

DEEPAK SHIMKHADA:
The archaeologists are now
saying that they are perhaps

datable to 9000 BCE.

If it is true,

the archaeological fact
supports the story.

And that is what makes it
more interesting and more

significant, this discovery.

SHATNER:
The discovery of sunken ruins
off the coast of Dwarka

is proof that underwater
exploration can turn some myths

into reality.

Many experts believe that Dwarka
is just the tip of the iceberg,

and that there are even more
secrets lurking in the deep

that could challenge

our understanding
of both our planet...

...and human history.

YOUNG:
The biggest unanswered question

regarding the oceans is,

now that we've opened this door
to this scientific exploration,

what can be found

that will have some
impact on our own lives?

Well, the oceans,
they drive weather

and regulate temperature

in ways that we don't
fully understand now,

and the only way that we're
going to completely understand

is to go down there
and to gather more data.

And that's just one example.

The ocean is constantly
throwing up surprises.

VESCOVO:
Will we find remnants
of an ancient civilization

VESCOVO:
Will we find remnants
of an ancient civilization
that no one knew about?

that no one knew about?

I don't know, but that

unknown is what drives me,
because there's a chance

that we'll find
something revolutionary

at the bottom of the ocean

that no one had ever
thought of before.

HALLS:
Even though we are the first

generation ever
to explore under the sea

with any level
of technology and rigor,

the deep sea still eludes us.

And the good thing is,

it's becoming more
and more accessible.

Imagine what we can discover
in the next 50 years.

So, what do you think?

What still lies in the deepest,
darkest corners of the ocean?

Well, in spite of
everything we've learned

about the underwater world,

we simply don't know
what else is down there

we simply don't know
what else is down there
waiting to be found.

waiting to be found.

And that mystery is what
compels us to keep diving,

to keep searching,
in the hope that one day

we will uncover all
the secrets of the deep that,

we will uncover all
the secrets of the deep that,
for the moment, remain...

for the moment, remain...

unexplained.

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