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SHATNER: Subterranean cities,
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hidden from human eyes.
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Mysterious tombs,
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where mourners could speak
directly to the dead.
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And caves filled
with giant crystals
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that are as beautiful
as they are deadly.
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For centuries,
mankind has wondered,
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what lies deep beneath our feet?
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Is there a subterranean world
filled with mystery and danger?
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Or one that hides untold riches?
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Perhaps even the secrets
of the universe?
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Well, that is what
we'll try and find out.
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♪
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Bordered by the Black Sea
to the north
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and by the Taurus Mountains
to the south,
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lies the craggy regions
of Cappadocia.
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Here, wind, water, and time
have sculpted the volcanic rocks
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into bizarre
and almost surreal shapes.
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But believe it or not,
the most unusual thing
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that was ever discovered
in this otherworldly landscape
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was found not above ground,
but far below.
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In 1963, during a simple
home renovation
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in the town of Derinkuyu,
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a cave wall was punctured,
revealing a passageway
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to what appeared to be
an intricate underground city,
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thousands of years old
and more than 280 feet deep.
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Derinkuyu is
a pretty amazing story,
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'cause just imagine
that you're working
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in your basement one day.
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You knock a hole in the wall,
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and what you find
is a city that is,
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it's sort of the size
of a-a really large castle,
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but it's actually underground.
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Uh, and it was done in a time
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before there was really
any mechanical means
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to provide water or ventilation,
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or any of those things.
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ANDREW COLLINS:
The only thing on the surface that you can see
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are what appear to be wells.
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As you approach Derinkuyu,
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you would certainly not be aware
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that you were walking
over the position
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of an underground city.
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It would have been the home
for thousands of people
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at a time at some point
in the distant past.
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SHATNER:
Home to thousands?
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It seems hard to believe
that an entire city
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could actually
exist underground.
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And yet, experts claim
that Derinkuyu housed
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an estimated 20,000 men,
women, and children
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and included religious centers,
storerooms, and living rooms.
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But how?
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MICHAEL DENNIN: Derinkuyu
appears to be a combination of
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leveraging natural cave systems,
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and then building in
human technology to connect it.
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And one of the things
that's fascinating about this
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is the ventilation system,
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because here you're really just
worried about getting air in,
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and waste like CO2 and air out.
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You're gonna be able
to store water.
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If you think about
how much fresh water
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is already
naturally underground,
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we're constantly digging down
to get to wells,
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but if you're
already underground,
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the wells are right there.
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So you have the possibility
of great fresh water sources.
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SHATNER:
Many archeologists and scholars
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claim that Derinkuyu
was most likely built
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around 800 BC by the Phrygians,
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a Bronze Age people
related to the Trojans,
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and was intended to serve
as a temporary shelter
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from invasion.
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But others believe it was built
by the Hittites,
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a warrior people
mentioned in the Bible,
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who flourished
a few hundred years before that.
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BURROWS:
This is in a place that's had multiple wars.
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There's conflict taking place
all the time.
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And when you're above ground,
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people can see you for miles.
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You know, each night
you're lighting fires
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to get some light
inside the space.
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And so, that can be seen
from 20 miles or more.
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Once they go below ground,
they're invisible.
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JOHN BRANDENBERG:
It has, uh, massive stones that can be lowered
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to block passageways
that human beings
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can only go through
in single file,
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making it very easy to defend.
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There are also rumors
that it is connected
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by a vast tunnel system
going many, many kilometers
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to other underground cities
in the neighborhood.
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So, it had emergency
escape routes.
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So the whole thing
was a quite remarkable
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subterranean fortress.
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SHATNER:
While there is evidence to suggest
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that several different cultures
have used Derinkuyu
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as a fortified sanctuary
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in the centuries
that have passed
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since its initial construction,
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some researchers have theorized
that it is much, much older
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than mainstream
archeologists think.
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And that its original architects
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had an even bigger threat
in mind when they built it.
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COLLINS:
The curator of Derinkuyu in Cappadocia,
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Omer Demir, had found
the evidence suggesting
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that each of the different
stories or levels
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would seem
to have been constructed
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by different cultures
at different times.
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And what he found
was incredible.
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For he discovered
that there were tools,
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stone tools here,
that dated back
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to Paleolithic times.
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The implications
of this are enormous,
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because what this suggests
is that Derinkuyu goes back
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at least 12,000 years,
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and was present at the end
of the last Ice Age;
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and may well have been a place
where our ancestors
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sought refuge at the time
of a cataclysm,
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a cataclysm that may well
have devastated
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large parts of the Earth
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at the very end
of the Paleolithic era.
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SHATNER:
A cataclysm?
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Could it be that
the original inhabitants
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of Derinkuyu built it
as a shelter to protect them
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during the Earth's
last great Ice Age?
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A time when the Earth's climate
was estimated to be
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more than 10 degrees colder
than it is now?
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So cold that hardly anything
could grow,
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or even survive, above ground?
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DENNIN:
When you build your city underground,
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you get two major
off-the-top advantages,
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one sort of environmental.
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You're gonna have
great thermal properties.
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It's gonna be cool
when you need it to be cool,
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but it won't get too cold,
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so it'll be kind of warm enough
when you need it to be warm.
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Thinking about when this
was built and inhabited
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really remains this exciting,
mysterious, open question.
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Even this idea of
other cities underground,
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like, how common was that
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for humans to build
their homes underground,
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versus on the surface
of the ground?
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Derinkuyu was rediscovered
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during the 1960s by accident.
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And there are still areas of it
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that have not been explored
to this day.
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So the implications of this
are incredible.
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It does feel like
we've just really
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scratched the surface
of what could be below us.
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There could be much more.
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There could be many more of
these cave systems in Turkey.
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So there's mysteries
still to be found
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deep within the Earth.
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SHATNER:
The truth is, we may never know for sure why,
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or even how these ancient
underground cities were built.
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And that's especially true
in the case of Derinkuyu;
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because the secrets
of its construction techniques
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seem to have disappeared,
along with whoever built it.
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BURROWS:
Even today, with all of the modern technology
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that we have, it would be
incredibly complicated
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and a massive undertaking
to do something like that.
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And sometimes, we look at these
ancient marvels,
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and we try and figure out,
could we build that today,
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to that level of accuracy,
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that sort of quality
of construction
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in that amount of time?
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And the answer's no,
which is pretty amazing
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that several thousand years
later, they're better than us.
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SHATNER:
Is it possible the builders of Derinkuyu
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knew something we don't?
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Not merely about
constructing cities
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deep within the Earth,
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but about humanity's need
for such refuges
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in order to survive?
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It's a fascinating, and perhaps,
slightly unnerving prospect.
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Not unlike another
underground structure,
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one that exists in order
to maintain communication
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after the end
of civilization itself.
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NICK REDFERN:
In the event of an attack, it's believed the United States
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it's not difficult to believe
the United States government
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has a closet full of secrets.
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But what could be so secret
that they feel the need
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to keep it hidden
so far underground?
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Area 51 is the world's
most secret installation.
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Historically, we know
that it was used
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for the testing
of early spy planes,
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like the U-2
and the SR-71 Blackbird.
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A number of whistleblowers
have come forward
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claiming to have seen levels
up to about
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seven or eight levels,
um, deep below the desert,
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protecting whatever's
really going on at Area 51.
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TAYLOR:
If there are these large tunnels and pathways under Area 51,
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so many people would have
to cooperate in building it
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that'd be difficult keeping
it a secret.
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But you could also
ask the question,
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when was the last time
you paid any attention
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to a new subway tunnel
being, uh, constructed
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under the city
in which you live?
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You probably never paid
attention to it.
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So, it could be built
right under your nose
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and you would never know it--
or care, for that matter.
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SHATNER:
Deep beneath these snowy peaks,
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encased within thousands of tons
of solid granite,
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lies the most sophisticated
and impenetrable
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military installation
in the world.
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The Cheyenne Mountain Complex
was built, uh, in the '60s
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and was operational in 1967.
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And the idea was that you have
all of your information
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for our national missile defense
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and offense capabilities
to be operated from there.
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So it had to be able
to withstand major natural
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and man-made disasters
such as a nuclear attack.
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So, the Air Force
and Army and Navy,
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all of the services,
they were in there.
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Basically, it was the nexus
of our Cold War defense center.
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REDFERN:
The Cold War was at its height, and for that reason,
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it demonstrated
why we had the need
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to have these kind of facilities
deeply below ground,
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to allow them to hopefully
survive a nuclear attack
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if the worst scenario
ever happened.
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SHATNER:
Originally built for a staggering cost
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of almost $150 million,
or over one billion today,
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the Cheyenne Mountain Complex
spans an incredible five acres
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and contains
13 three-story buildings
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capable of housing
up to 2,000 personnel,
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independent power,
heating and cooling systems,
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a lake that serves
as a reservoir
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and 25-ton blast doors capable
of withstanding the force
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of a 30-megaton
nuclear explosion.
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TAYLOR:
If there was a nuclear attack, a direct hit,
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Cheyenne Mountain
was deep enough
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that you would not be
dry-roasted.
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You would survive the heat.
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Then you got gamma rays
and radioactive fallout,
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but the best protection
is material.
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Dirt, earth, rocks.
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All these things are gonna
protect you from that.
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SHATNER:
The Cheyenne Mountain Complex
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was so central
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00:13:06,448 --> 00:13:08,482
to the United States
government's survival plans
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00:13:08,586 --> 00:13:10,448
that they eventually realized
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00:13:10,551 --> 00:13:15,379
it may not actually be a good
idea for it to be so isolated.
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Let's say,
in a worst-case scenario,
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00:13:18,344 --> 00:13:23,000
that Washington D.C. gets
taken out by a nuclear weapon.
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Well, one of the theories
is that the president and all
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of his staff would quickly
be taken to the Denver Airport.
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The Denver Airport not being
too far from Cheyenne Mountain,
247
00:13:37,172 --> 00:13:41,689
it would make great sense
to have a tunnel rail system
248
00:13:41,793 --> 00:13:45,931
deep below the nation
which potentially could go
249
00:13:46,034 --> 00:13:50,379
from Cheyenne Mountain straight
through to the Denver Airport.
250
00:13:50,482 --> 00:13:52,206
When they were building
that airport,
251
00:13:52,310 --> 00:13:53,586
there was this massive--
252
00:13:53,689 --> 00:13:56,379
and I mean massive--
hole in the ground.
253
00:13:56,482 --> 00:13:58,689
And buildings
were going up in there.
254
00:13:58,793 --> 00:14:01,172
Buildings that,
all of a sudden, you know,
255
00:14:01,275 --> 00:14:03,551
you-you didn't see them
when the airport was finished.
256
00:14:03,655 --> 00:14:05,931
And their answer
to that was, "Well,
257
00:14:06,034 --> 00:14:08,275
"the buildings were incorrect,
and we had such a big hole,
258
00:14:08,379 --> 00:14:10,896
we just covered them over
and kept building."
259
00:14:11,000 --> 00:14:13,034
W-Who would buy that?
260
00:14:13,137 --> 00:14:18,931
REDFERN:
When the airport was being constructed in 1995,
261
00:14:19,034 --> 00:14:23,931
some of the staff who were
working on the facility itself,
262
00:14:24,034 --> 00:14:26,379
construction staff, engineers,
263
00:14:26,482 --> 00:14:29,793
they claimed to have seen
what appeared to be
264
00:14:29,896 --> 00:14:34,448
large tunneling devices,
and also, large tunnels,
265
00:14:34,551 --> 00:14:37,586
which shouldn't
really have been there.
266
00:14:37,689 --> 00:14:42,862
A lot of people theorize that
there is something to this deal
267
00:14:42,965 --> 00:14:45,793
about Denver Airport
because an airport
268
00:14:45,896 --> 00:14:49,793
is an extremely secure location
on the surface.
269
00:14:49,896 --> 00:14:52,275
You can't just walk in
and go anywhere you want.
270
00:14:52,379 --> 00:14:55,931
That's good if you're hiding
stuff underground.
271
00:14:57,655 --> 00:15:00,862
SHATNER:
Could the United States government actually be operating
272
00:15:00,965 --> 00:15:04,862
a top-secret tunnel system
whose epicenter is beneath
273
00:15:04,965 --> 00:15:06,448
one of the largest
transportation hubs
274
00:15:06,551 --> 00:15:07,965
in the country?
275
00:15:08,068 --> 00:15:12,344
According to some experts,
the answer is yes.
276
00:15:12,448 --> 00:15:17,206
And that may only be the tip
of the proverbial iceberg.
277
00:15:17,310 --> 00:15:21,620
REDFERN:
For strategic means, it's believed the United States
278
00:15:21,724 --> 00:15:25,689
has numerous
underground facilities
279
00:15:25,793 --> 00:15:28,068
which, essentially,
have been bored out
280
00:15:28,172 --> 00:15:32,206
with these gigantic boring
machines to create tunnels
281
00:15:32,310 --> 00:15:36,931
to essentially take people
all across the United States
282
00:15:37,034 --> 00:15:39,724
in the event of an attack.
283
00:15:39,827 --> 00:15:43,275
We're talking about trains
deep under the surface
284
00:15:43,379 --> 00:15:46,620
to essentially go from
the east coast to the west coast
285
00:15:46,724 --> 00:15:48,379
to the north to the south
286
00:15:48,482 --> 00:15:54,862
to hide from the attacks
that might be going on.
287
00:15:54,965 --> 00:15:57,655
There has been a great advance,
just in civilian
288
00:15:57,758 --> 00:16:01,344
and openly-known abilities
to dig tunnels.
289
00:16:01,448 --> 00:16:04,379
This is being taken advantage of
by Elon Musk
290
00:16:04,482 --> 00:16:07,793
and his Hyperloop concept,
that we can create
291
00:16:07,896 --> 00:16:12,275
long-distance underground
transportation systems.
292
00:16:12,379 --> 00:16:15,379
So we can only imagine
what has been accomplished
293
00:16:15,482 --> 00:16:19,862
in the secretive world
of the U.S. military.
294
00:16:21,241 --> 00:16:24,551
SHATNER:
But as profound and disturbing as is the notion
295
00:16:24,655 --> 00:16:29,241
of a vast network of underground
bases and secret tunnels,
296
00:16:29,344 --> 00:16:31,793
there are some underground
worlds that are formed
297
00:16:31,896 --> 00:16:35,655
not by man but by nature.
298
00:16:35,758 --> 00:16:38,551
And in at least one case,
299
00:16:38,655 --> 00:16:41,965
the formation is so beautiful
300
00:16:42,068 --> 00:16:45,758
that it's easy to forget
that, just like mankind,
301
00:16:45,862 --> 00:16:50,034
Mother Nature
can also be deadly.
302
00:16:59,793 --> 00:17:02,448
TAYLOR:
FIn the mineral-rich towne gotten aof Naica,they are,
303
00:17:02,551 --> 00:17:05,724
more than 1,000 feet below
the surface of the Earth,
304
00:17:05,827 --> 00:17:08,482
a group of miners drilling
through a cave wall
305
00:17:08,586 --> 00:17:11,448
make a remarkable discovery.
306
00:17:11,551 --> 00:17:13,827
Not of precious metals,
307
00:17:13,931 --> 00:17:17,896
but something far more wonderous
and mysterious.
308
00:17:20,000 --> 00:17:24,896
A glittering cavern, untouched
for half a million years,
309
00:17:25,000 --> 00:17:27,655
filled with the largest crystals
ever found.
310
00:17:27,758 --> 00:17:29,724
TAYLOR:
It's amazing.
311
00:17:29,827 --> 00:17:33,103
There are crystals
that are huge.
312
00:17:33,206 --> 00:17:35,034
So big you can actually walk
across them.
313
00:17:35,137 --> 00:17:38,310
And for these crystals to have
gotten as big as they are,
314
00:17:38,413 --> 00:17:39,689
they had to have been
growing for hundreds
315
00:17:39,793 --> 00:17:42,586
of thousands of years.
316
00:17:42,689 --> 00:17:45,310
It's a fascinating location.
317
00:17:45,413 --> 00:17:49,724
This is something you would
think would only exist
318
00:17:49,827 --> 00:17:53,137
in the world of science fiction
and fantasy,
319
00:17:53,241 --> 00:17:57,448
but the fact is,
it's all too real.
320
00:17:59,413 --> 00:18:03,137
SHATNER:
Measuring up to an astonishing 40 feet in length
321
00:18:03,241 --> 00:18:07,517
and weighing as much as 55 tons,
the giant beams
322
00:18:07,620 --> 00:18:12,310
are the purest form of selenite
crystal in the world.
323
00:18:12,413 --> 00:18:16,482
Crystals are the most
orderly structure in nature,
324
00:18:16,586 --> 00:18:21,448
and they have the ability
to absorb frequency and energy
325
00:18:21,551 --> 00:18:23,689
from objects around them.
326
00:18:23,793 --> 00:18:30,482
Now, it is my theory that these
giant pylons have the ability
327
00:18:30,586 --> 00:18:34,827
to transmit and receive
information and light.
328
00:18:34,931 --> 00:18:40,344
SHATNER:
Only a few months after its discovery, a team of scientists
329
00:18:40,448 --> 00:18:44,931
was sent in to study
this geological anomaly.
330
00:18:45,034 --> 00:18:48,551
They soon learned
that Naica's Crystal Cave may be
331
00:18:48,655 --> 00:18:52,586
not only beautiful but deadly.
332
00:18:52,689 --> 00:18:57,827
TAYLOR:
It's 90% to 100% relative humidity inside this cave.
333
00:18:57,931 --> 00:19:01,379
And it's always over
113 degrees Fahrenheit.
334
00:19:01,482 --> 00:19:03,724
You might think, "Well,
113 degrees isn't that bad.
335
00:19:03,827 --> 00:19:05,413
"It gets 140 degrees
336
00:19:05,517 --> 00:19:08,517
in the deserts in Iraq all
the time and people live there,"
337
00:19:08,620 --> 00:19:12,344
but the relative humidity
in those deserts is 10%.
338
00:19:12,448 --> 00:19:15,689
In this cave,
there's so much humidity,
339
00:19:15,793 --> 00:19:19,034
you can't sweat
and cool your body off.
340
00:19:20,379 --> 00:19:23,448
HUTCHISON:
I received an invitation to go
341
00:19:23,551 --> 00:19:28,172
on an expedition and exploration
of these giant crystals.
342
00:19:28,275 --> 00:19:31,724
I was aware
of the heat and humidity,
343
00:19:31,827 --> 00:19:33,448
but nothing prepared me
344
00:19:33,551 --> 00:19:37,241
for what hit me
when I entered those caves.
345
00:19:37,344 --> 00:19:41,034
I felt like I was hit
by a tsunami
346
00:19:41,137 --> 00:19:45,172
of tremendous heat and humidity.
347
00:19:45,275 --> 00:19:48,862
I started shaking, I was scared.
348
00:19:48,965 --> 00:19:52,000
These are near-fatal conditions.
349
00:19:52,103 --> 00:19:55,724
SHATNER:
Due to the Crystal Cave's lethal atmosphere,
350
00:19:55,827 --> 00:19:57,689
the research team was restricted
351
00:19:57,793 --> 00:20:01,620
to ten-minute exposures
to avoid being cooked alive.
352
00:20:01,724 --> 00:20:06,000
For gemologist Leela Hutchinson,
the most unexpected discovery
353
00:20:06,103 --> 00:20:10,827
wasn't something she saw
but something she heard.
354
00:20:10,931 --> 00:20:16,068
HUTCHISON:
One of the things that I realized as I had to focus
355
00:20:16,172 --> 00:20:20,724
so intensely
to keep my wits about me,
356
00:20:20,827 --> 00:20:25,379
was this ability
to hear a low hum.
357
00:20:25,482 --> 00:20:27,344
[low hum sounding]
358
00:20:30,551 --> 00:20:32,931
And I thought
that was very strange.
359
00:20:33,034 --> 00:20:34,758
I didn't know
if it was the machinery
360
00:20:34,862 --> 00:20:37,137
that were in the tunnels
361
00:20:37,241 --> 00:20:41,137
or if it was something that
might be in the cave itself.
362
00:20:42,551 --> 00:20:46,379
And later I realized,
could this have been
363
00:20:46,482 --> 00:20:50,689
extremely low-frequency
resonating in there?
364
00:20:50,793 --> 00:20:53,551
Nikola Tesla was quoted
as once saying
365
00:20:53,655 --> 00:20:57,068
that "we may not understand
the growth of a crystal,
366
00:20:57,172 --> 00:21:02,103
but nonetheless,
it is a living being."
367
00:21:03,448 --> 00:21:08,068
SHATNER:
Energy from living, giant crystals?
368
00:21:08,172 --> 00:21:10,862
In an attempt to navigate
the unusual properties
369
00:21:10,965 --> 00:21:13,827
of the crystals
within the Naica cave,
370
00:21:13,931 --> 00:21:16,620
NASA developed
special cooling equipment
371
00:21:16,724 --> 00:21:20,241
allowing scientists to withstand
the cave's lethal conditions
372
00:21:20,344 --> 00:21:23,137
for as much as 30 minutes
at a time.
373
00:21:23,241 --> 00:21:28,413
And according to their research,
the hum emanating
374
00:21:28,517 --> 00:21:31,379
from the Crystal Cave
may not be because its crystals
375
00:21:31,482 --> 00:21:34,758
are storing energy,
but because they're harboring
376
00:21:34,862 --> 00:21:39,241
something even more unexpected:
life.
377
00:21:39,344 --> 00:21:43,517
HUTCHINSON:
In the 2008 expedition, the NASA scientists
378
00:21:43,620 --> 00:21:47,689
went into the caves
and drew out fluid inclusions
379
00:21:47,793 --> 00:21:49,793
in the largest crystals,
380
00:21:49,896 --> 00:21:55,862
and found microbes that are
considered to be extremophiles.
381
00:21:55,965 --> 00:21:59,310
Microbes that are
living organisms.
382
00:21:59,413 --> 00:22:03,551
They're single-celled,
and they have the ability
383
00:22:03,655 --> 00:22:07,931
to survive and thrive
in extreme environments.
384
00:22:08,034 --> 00:22:13,206
One of the interesting things
about the extremophiles was
385
00:22:13,310 --> 00:22:15,482
there is nothing
in our genetic database
386
00:22:15,586 --> 00:22:20,413
that comes close to what
these extremophiles are.
387
00:22:22,379 --> 00:22:26,379
SHATNER:
Microbes unlike anything seen on Earth.
388
00:22:26,482 --> 00:22:30,586
NASA's astrobiology report
suggests these extremophiles
389
00:22:30,689 --> 00:22:33,068
are up to 50,000 years old,
390
00:22:33,172 --> 00:22:35,517
and could survive
on other planets.
391
00:22:35,620 --> 00:22:39,068
But many wonder: is there a risk
involved in handling
392
00:22:39,172 --> 00:22:42,482
these never-before-seen
organisms?
393
00:22:42,586 --> 00:22:46,310
The Cave of the Crystals
can be a dangerous place.
394
00:22:47,965 --> 00:22:50,379
For example,
not long after it was found,
395
00:22:50,482 --> 00:22:54,655
one of the workers actually
snuck back into the cave.
396
00:22:54,758 --> 00:22:58,758
Not surprisingly,
he passed out and died.
397
00:23:00,413 --> 00:23:04,241
Now, it's unclear if he died
from the air quality,
398
00:23:04,344 --> 00:23:06,172
the heat, the humidity.
399
00:23:06,275 --> 00:23:08,793
Or could it have been the
extremophile microorganisms
400
00:23:08,896 --> 00:23:10,827
that were in there?
401
00:23:12,793 --> 00:23:15,620
Will we ever find out
whether the giant crystals
402
00:23:15,724 --> 00:23:19,034
in the Naica cave
hold the key to understanding
403
00:23:19,137 --> 00:23:22,068
the origins of life?
404
00:23:22,172 --> 00:23:25,379
Or is this one underground
mystery that is simply
405
00:23:25,482 --> 00:23:29,827
too dangerous for us
to investigate?
406
00:23:29,931 --> 00:23:32,413
Perhaps.
407
00:23:32,517 --> 00:23:35,896
But not all underground worlds
are meant to help us understand
408
00:23:36,000 --> 00:23:37,586
the mysteries of life.
409
00:23:37,689 --> 00:23:40,827
Some actually appear
to be constructed
410
00:23:40,931 --> 00:23:44,137
to bring us closer...
411
00:23:44,241 --> 00:23:47,827
to what happens to us
after we die.
412
00:23:56,000 --> 00:23:57,896
SHATNER:
While excavating an areaLINDA ENEIX: It's extraordinary.
413
00:23:58,000 --> 00:24:00,310
for a new housing development
414
00:24:00,413 --> 00:24:03,620
just off the eastern coast of
this tiny Mediterranean island,
415
00:24:03,724 --> 00:24:07,482
construction workers encounter
something unexpected
416
00:24:07,586 --> 00:24:10,344
and quite unusual
beneath their work site.
417
00:24:10,448 --> 00:24:16,103
A prehistoric structure,
hewn from solid limestone,
418
00:24:16,206 --> 00:24:20,103
dating back more than
5,000 years.
419
00:24:20,206 --> 00:24:24,137
Upon further inspection,
archaeologists soon realize
420
00:24:24,241 --> 00:24:27,137
that what the unwitting workers
have unearthed
421
00:24:27,241 --> 00:24:29,758
isn't merely a lost
underground temple
422
00:24:29,862 --> 00:24:31,310
or ancient sanctuary,
423
00:24:31,413 --> 00:24:36,103
but a massive subterranean
necropolis.
424
00:24:36,206 --> 00:24:42,000
The Hypogeum of Hal Saflieni.
425
00:24:42,103 --> 00:24:44,965
The Malta Hypogeum is
an architectural wonder
426
00:24:45,068 --> 00:24:46,620
of the ancient world.
427
00:24:46,724 --> 00:24:51,103
It was carved using primarily
stone and bone tools
428
00:24:51,206 --> 00:24:53,206
by an ancient population
that lived on Malta
429
00:24:53,310 --> 00:24:55,344
thousands of years ago.
430
00:24:55,448 --> 00:25:01,758
So, it's actually older than the
pyramids of Egypt or Stonehenge.
431
00:25:01,862 --> 00:25:04,206
"Hypogeum" is basically
a word that comes
432
00:25:04,310 --> 00:25:08,482
from the Greek terms for
"cavity" or "space underground."
433
00:25:08,586 --> 00:25:11,275
It extends
on three different stories
434
00:25:11,379 --> 00:25:14,482
about seven-point-some meters
below ground.
435
00:25:14,586 --> 00:25:19,310
It covers an area
of about 5,400 square feet.
436
00:25:19,413 --> 00:25:23,034
Malta's Hypogeum is, you know,
one of those great examples
437
00:25:23,137 --> 00:25:27,000
of, uh, beautiful geometry,
uh, underground.
438
00:25:27,103 --> 00:25:29,586
So, the geometry
isn't by accident.
439
00:25:29,689 --> 00:25:32,241
It was done by somebody
who knows what they were doing.
440
00:25:32,344 --> 00:25:33,620
And it looks to me, like,
441
00:25:33,724 --> 00:25:35,620
you know, this was done
for a purpose.
442
00:25:36,689 --> 00:25:38,448
SHATNER:
A purpose?
443
00:25:38,551 --> 00:25:40,896
Although no one knows
for certain who originally built
444
00:25:41,000 --> 00:25:43,413
the Malta Hypogeum or why,
445
00:25:43,517 --> 00:25:46,517
the bones of more
than 7,000 souls
446
00:25:46,620 --> 00:25:51,137
line its intricate labyrinth
of corridors and alcoves.
447
00:25:51,241 --> 00:25:54,344
So, according to logic,
448
00:25:54,448 --> 00:25:59,206
it is exactly what it appears
to be: an ancient burial site.
449
00:25:59,310 --> 00:26:05,413
But logic alone
may not be at play here.
450
00:26:05,517 --> 00:26:09,241
There is a very intriguing room
in the Hypogeum,
451
00:26:09,344 --> 00:26:10,931
which is in
the middle level, uh,
452
00:26:11,034 --> 00:26:12,689
that is called the Oracle Room.
453
00:26:12,793 --> 00:26:16,137
And this Oracle Room is
basically a resonance chamber.
454
00:26:16,241 --> 00:26:18,689
And it's designed,
so it would seem,
455
00:26:18,793 --> 00:26:22,655
to amplify
any acoustic sound waves.
456
00:26:22,758 --> 00:26:26,068
So, even by whispering,
for example,
457
00:26:26,172 --> 00:26:28,620
uh, the design of the room
amplifies this
458
00:26:28,724 --> 00:26:33,413
and-and makes it
into a very loud baritone sound.
459
00:26:33,517 --> 00:26:36,172
KREISBERG:
The Oracle chamber itself
460
00:26:36,275 --> 00:26:39,000
appears to have been
carved specifically
461
00:26:39,103 --> 00:26:42,275
to allow sound frequencies
to travel,
462
00:26:42,379 --> 00:26:46,413
and the ceiling
of the Oracle chamber
463
00:26:46,517 --> 00:26:49,689
actually appears to have been
carved to direct sound.
464
00:26:49,793 --> 00:26:51,517
There are also niches
that have been carved
465
00:26:51,620 --> 00:26:53,620
in the sides of
the Oracle chamber that seem
466
00:26:53,724 --> 00:26:59,172
to be a way to produce echoes
and were also created,
467
00:26:59,275 --> 00:27:01,758
in a way, to tune it
to the right frequency.
468
00:27:01,862 --> 00:27:04,034
So, there was
a sophistication there
469
00:27:04,137 --> 00:27:07,000
that, you know, is unexpected.
470
00:27:07,103 --> 00:27:10,758
SHATNER:
In 2014, while conducting a series of experiments
471
00:27:10,862 --> 00:27:13,551
in an attempt to understand
the design elements
472
00:27:13,655 --> 00:27:16,896
behind the Hypogeum's
unusual acoustics,
473
00:27:17,000 --> 00:27:18,517
scientists discovered
474
00:27:18,620 --> 00:27:23,000
an unexpected
and hair-raising phenomenon.
475
00:27:23,103 --> 00:27:26,551
KREISBERG:
We set up microphones and we used recording devices
476
00:27:26,655 --> 00:27:29,862
that were very sensitive,
and we carried out experiments
477
00:27:29,965 --> 00:27:34,896
using the human voice in that
110 to 112, uh, hertz range.
478
00:27:35,000 --> 00:27:38,620
So, these are very low,
guttural, bass sounds,
479
00:27:38,724 --> 00:27:43,103
and they reverberate in a very
strong way within these temples.
480
00:27:44,310 --> 00:27:46,344
[low-pitched,
resonant vocalizations]
481
00:28:11,103 --> 00:28:12,413
ENEIX:
I-It's extraordinary.
482
00:28:12,517 --> 00:28:14,586
It's like being
inside of a bell.
483
00:28:14,689 --> 00:28:17,517
And those vibrations
are felt inside your body.
484
00:28:17,620 --> 00:28:20,586
You feel it in your tissue,
you feel it in your bones.
485
00:28:20,689 --> 00:28:23,620
It can raise the hair
off the back of your neck.
486
00:28:23,724 --> 00:28:27,896
Imagine going there to this dark
and spooky underground place
487
00:28:28,000 --> 00:28:31,896
5,000 years ago,
with this weird, eerie sound
488
00:28:32,000 --> 00:28:34,896
going on around you and-and
knowing that there are bones
489
00:28:35,000 --> 00:28:38,034
and-- the whole thing
is creepy now.
490
00:28:40,206 --> 00:28:44,379
PAUL DEVEREUX:
It clearly was-- some sort of ritual activity went on there.
491
00:28:44,482 --> 00:28:47,275
There is a niche
in the Oracle Room,
492
00:28:47,379 --> 00:28:49,206
that if you spoke into it,
it could resonate
493
00:28:49,310 --> 00:28:51,482
throughout the whole structure.
494
00:28:51,586 --> 00:28:54,620
And so, some thought
it was significant,
495
00:28:54,724 --> 00:28:57,655
that a priest might've
intoned into it a voice--
496
00:28:57,758 --> 00:29:00,758
that his booming voice would go
through the whole Hypogeum.
497
00:29:00,862 --> 00:29:03,172
Uh, like a god.
498
00:29:03,275 --> 00:29:07,896
SHATNER:
The voice of a god?
499
00:29:08,000 --> 00:29:11,482
Those who have visited
the Malta Hypogeum
500
00:29:11,586 --> 00:29:15,413
describe it as feeling
like a descent
501
00:29:15,517 --> 00:29:17,724
into the underworld.
502
00:29:17,827 --> 00:29:19,862
As a result,
some experts believe
503
00:29:19,965 --> 00:29:23,000
this subterranean nightmare
was intentionally constructed
504
00:29:23,103 --> 00:29:28,827
to enable its visitors
to speak with the dead.
505
00:29:28,931 --> 00:29:34,206
STEAVU:
Overtone chanting is a common practice
506
00:29:34,310 --> 00:29:36,413
in many cultures
in, uh, East Asia,
507
00:29:36,517 --> 00:29:39,000
and, uh, North Asia
and South Asia as well.
508
00:29:39,103 --> 00:29:42,482
You do have this strong
connection between chanting
509
00:29:42,586 --> 00:29:46,620
and communication with
the divine or with the deceased.
510
00:29:46,724 --> 00:29:50,586
And I believe at the Hypogeum,
we may have a similar situation
511
00:29:50,689 --> 00:29:53,758
in which there seems to have
been an active ritual function
512
00:29:53,862 --> 00:29:58,793
of, uh, not only placing
the deceased or remains there,
513
00:29:58,896 --> 00:30:02,413
but where people would attempt
to establish communication
514
00:30:02,517 --> 00:30:04,551
with the dead.
515
00:30:06,586 --> 00:30:11,758
In the range of 110 to 112 hertz
is a frequency that, uh,
516
00:30:11,862 --> 00:30:14,103
has a specific effect
on our brain.
517
00:30:14,206 --> 00:30:18,379
It puts us in a sleep state and
has us producing alpha waves.
518
00:30:18,482 --> 00:30:21,275
What happens when the alpha
waves are produced
519
00:30:21,379 --> 00:30:25,137
is that it kind of quiets the,
um, language center of our brain
520
00:30:25,241 --> 00:30:29,448
and puts us in more of a
meditative or trance-like state.
521
00:30:29,551 --> 00:30:33,344
It's similar, in many regards,
to what happens, uh,
522
00:30:33,448 --> 00:30:36,896
when a shaman uses
the practice of ingesting
523
00:30:37,000 --> 00:30:39,931
psychoactive chemicals,
whether it's ayahuasca
524
00:30:40,034 --> 00:30:43,586
or whether it's, uh,
mushrooms of some type.
525
00:30:43,689 --> 00:30:45,862
STEAVU:
So, it stands to reason that, potentially,
526
00:30:45,965 --> 00:30:50,482
people could attain a different
level of consciousness
527
00:30:50,586 --> 00:30:54,448
in which they would be
susceptible to have experiences
528
00:30:54,551 --> 00:30:58,000
of communicating with the dead
or with the divine.
529
00:31:00,551 --> 00:31:02,000
SHATNER:
As far-fetched as the notion
530
00:31:02,103 --> 00:31:04,793
of communicating with the dead
may seem to us,
531
00:31:04,896 --> 00:31:07,724
some believe whoever built
the Hypogeum
532
00:31:07,827 --> 00:31:09,689
may have been on to something.
533
00:31:09,793 --> 00:31:13,965
Because it appears
they left behind instructions.
534
00:31:15,965 --> 00:31:19,413
DEVEREUX:
There is this spiralic painting
535
00:31:19,517 --> 00:31:23,034
on the ceiling
of the, uh, Oracle Room.
536
00:31:23,137 --> 00:31:27,655
And it's not unusual to use
spiralic shapes in prehistory
537
00:31:27,758 --> 00:31:33,241
and early times to represent--
visually, graphically--
538
00:31:33,344 --> 00:31:36,103
represent sound
in terms of spirals.
539
00:31:36,206 --> 00:31:39,000
So it was clearly
an intellectual connection.
540
00:31:39,103 --> 00:31:42,896
KREISBERG:
The clues may lie right before our eyes.
541
00:31:43,000 --> 00:31:46,275
Those sounds, those songs,
those tones, those frequencies
542
00:31:46,379 --> 00:31:48,827
that were played and heard
543
00:31:48,931 --> 00:31:51,344
were of the utmost
importance to them.
544
00:31:51,448 --> 00:31:53,551
We don't understand exactly why.
545
00:31:53,655 --> 00:31:58,275
But by studying them, hopefully,
we can shed some light
546
00:31:58,379 --> 00:32:00,551
on not only what
they were trying to do
547
00:32:00,655 --> 00:32:03,241
but how we could use
those same concepts,
548
00:32:03,344 --> 00:32:05,103
those same understandings,
549
00:32:05,206 --> 00:32:08,379
to perhaps benefit
our society today.
550
00:32:09,379 --> 00:32:13,689
An ancient necropolis
551
00:32:13,793 --> 00:32:15,862
constructed and designed
552
00:32:15,965 --> 00:32:18,000
to allow people
to send messages
553
00:32:18,103 --> 00:32:20,275
into the afterlife?
554
00:32:20,379 --> 00:32:22,275
Fascinating...
555
00:32:22,379 --> 00:32:26,206
albeit a disturbing concept.
556
00:32:26,310 --> 00:32:29,379
Not unlike one of the most
persistent and bizarre theories
557
00:32:29,482 --> 00:32:31,275
about our planet.
558
00:32:31,379 --> 00:32:34,275
The notion that it could be...
559
00:32:34,379 --> 00:32:36,896
hollow.
560
00:32:45,931 --> 00:32:49,068
SHATNER:
Acclaimed novelist whJules Verne publishest.
561
00:32:49,172 --> 00:32:50,689
the science-fiction novel
562
00:32:50,793 --> 00:32:53,482
A Journey to the Center
of the Earth.
563
00:32:53,586 --> 00:32:56,344
The book--
which chronicles an adventure
564
00:32:56,448 --> 00:32:59,034
through a fantastical
subterranean world
565
00:32:59,137 --> 00:33:01,310
filled with mammoth creatures,
566
00:33:01,413 --> 00:33:02,896
underground oceans,
567
00:33:03,000 --> 00:33:07,758
and crystal caves--
is an instant success.
568
00:33:07,862 --> 00:33:11,896
But despite Jules Verne's
insistence that the story
569
00:33:12,000 --> 00:33:13,896
is nothing more
than a work of fantasy,
570
00:33:14,000 --> 00:33:16,275
many wondered...
571
00:33:16,379 --> 00:33:19,034
could some of what he wrote
572
00:33:19,137 --> 00:33:21,793
actually be true?
573
00:33:21,896 --> 00:33:26,379
We live on the surface
of planet Earth,
574
00:33:26,482 --> 00:33:31,000
but going back
many thousands of years,
575
00:33:31,103 --> 00:33:34,793
we have wondered
what is beneath our feet.
576
00:33:34,896 --> 00:33:36,931
Is it solid?
577
00:33:37,034 --> 00:33:40,103
Or is it possible
that it could be hollow?
578
00:33:40,206 --> 00:33:43,068
BRANDENBURG: One of the most
fascinating people
579
00:33:43,172 --> 00:33:45,793
in the history of science
is Edmond Halley,
580
00:33:45,896 --> 00:33:48,551
who Halley's Comet
is named after.
581
00:33:48,655 --> 00:33:52,034
Based on his explorations,
582
00:33:52,137 --> 00:33:55,000
he discovered the Earth's
magnetic field was fluctuating,
583
00:33:55,103 --> 00:33:59,655
that it was not
a steady, uniform object.
584
00:34:00,793 --> 00:34:02,724
It was changing in time.
585
00:34:02,827 --> 00:34:04,620
It appeared
to be kind of rotating
586
00:34:04,724 --> 00:34:06,896
relative to the surface
of the Earth.
587
00:34:07,000 --> 00:34:10,344
So he came up with
a quite elaborate model
588
00:34:10,448 --> 00:34:12,862
to try to explain
what he was seeing
589
00:34:12,965 --> 00:34:15,172
in his measurements
of the Earth's magnetic field.
590
00:34:15,275 --> 00:34:18,586
And one of the interesting
theories he came up with
591
00:34:18,689 --> 00:34:21,275
was the idea of a hollow Earth.
592
00:34:21,379 --> 00:34:24,034
REDFERN:
Edmond Halley
593
00:34:24,137 --> 00:34:26,931
believed there were
essentially three crusts--
594
00:34:27,034 --> 00:34:30,896
three rotating crusts
which surrounded this huge,
595
00:34:31,000 --> 00:34:34,689
hollowed-out portion
of planet Earth.
596
00:34:34,793 --> 00:34:37,241
SHATNER:
A hollow Earth?
597
00:34:37,344 --> 00:34:40,793
Is it possible that there's
actually another world
598
00:34:40,896 --> 00:34:44,379
located deep
within the Earth's crust?
599
00:34:44,482 --> 00:34:48,586
Could Jules Verne's fantastical
notion of a subterranean world
600
00:34:48,689 --> 00:34:51,689
located deep underground
have been based
601
00:34:51,793 --> 00:34:54,379
not on mere imagination
602
00:34:54,482 --> 00:34:57,172
but on scientific fact?
603
00:34:57,275 --> 00:35:02,551
Well, if one legendary explorer
is to be believed,
604
00:35:02,655 --> 00:35:04,689
the answer is yes.
605
00:35:04,793 --> 00:35:09,965
And he claimed to have
even seen it firsthand.
606
00:35:10,068 --> 00:35:13,137
REDFERN:
Rear Admiral Richard Byrd,
607
00:35:13,241 --> 00:35:16,724
in essence,
was somebody who we could equate
608
00:35:16,827 --> 00:35:20,586
with, like,
a real-life Indiana Jones.
609
00:35:20,689 --> 00:35:22,000
He traveled around the world
610
00:35:22,103 --> 00:35:24,413
having expeditions
and adventures.
611
00:35:24,517 --> 00:35:28,172
He was someone who visited
612
00:35:28,275 --> 00:35:32,172
the polar areas,
which really fascinated him.
613
00:35:32,275 --> 00:35:35,206
And in 1926,
614
00:35:35,310 --> 00:35:37,689
while flying over the caps,
615
00:35:37,793 --> 00:35:39,862
he was able to see
what he described
616
00:35:39,965 --> 00:35:44,275
as like a large green valley.
617
00:35:44,379 --> 00:35:47,862
NEWMAN:
One of the ideas about this whole hollow Earth theory
618
00:35:47,965 --> 00:35:51,551
is that there were multiple
entrances all over the world.
619
00:35:51,655 --> 00:35:54,379
But most notably,
the North and South Poles
620
00:35:54,482 --> 00:35:56,689
are possibly
the entrance for these.
621
00:35:56,793 --> 00:35:59,517
REDFERN:
According to the story,
622
00:35:59,620 --> 00:36:02,793
Byrd described
massive forest areas
623
00:36:02,896 --> 00:36:07,068
nurtured by some kind of sun
624
00:36:07,172 --> 00:36:09,689
deep inside the planet itself.
625
00:36:09,793 --> 00:36:12,689
And he claimed to have seen, uh,
626
00:36:12,793 --> 00:36:15,000
a fully grown woolly mammoth,
627
00:36:15,103 --> 00:36:19,448
which it would be amazing
if that was true.
628
00:36:19,551 --> 00:36:22,068
SHATNER:
Underground rivers,
629
00:36:22,172 --> 00:36:26,793
extinct mammoths and a sun
deep inside the Earth?
630
00:36:26,896 --> 00:36:30,103
Could the incredible account
of Admiral Byrd--
631
00:36:30,206 --> 00:36:32,758
one of the world's
greatest explorers--
632
00:36:32,862 --> 00:36:34,620
actually be true?
633
00:36:34,724 --> 00:36:36,413
But if so,
634
00:36:36,517 --> 00:36:39,103
where's the evidence?
635
00:36:41,896 --> 00:36:44,758
There's water on the surface
in huge oceans.
636
00:36:44,862 --> 00:36:46,793
What if there's a hole
in the mantle
637
00:36:46,896 --> 00:36:48,551
that allows some of it
to drain somewhere?
638
00:36:48,655 --> 00:36:50,000
Did it get captured there
639
00:36:50,103 --> 00:36:52,482
when the Earth was created
in its formation?
640
00:36:52,586 --> 00:36:54,413
I'll give you an example.
641
00:36:54,517 --> 00:36:56,689
In Mammoth Cave in Kentucky,
642
00:36:56,793 --> 00:36:58,793
there were
the remains of a shark
643
00:36:58,896 --> 00:37:01,862
from 330 million years ago.
644
00:37:01,965 --> 00:37:05,275
An extinct creature
found in this cave,
645
00:37:05,379 --> 00:37:07,827
in a cave--
not in an ocean but in a cave.
646
00:37:07,931 --> 00:37:11,379
What if this cave was
part of an ocean system
647
00:37:11,482 --> 00:37:13,758
that went deeper underground?
648
00:37:13,862 --> 00:37:16,379
BRANDENBURG:
As a scientist,
649
00:37:16,482 --> 00:37:18,310
the first thing I will concede,
650
00:37:18,413 --> 00:37:21,931
is that we do know there are
vast caverns below us,
651
00:37:22,034 --> 00:37:24,482
and there are vast structures
that are dynamic
652
00:37:24,586 --> 00:37:26,137
under the Earth.
653
00:37:26,241 --> 00:37:29,379
And so it's certainly possible.
654
00:37:29,482 --> 00:37:34,172
The Earth is about 7,000
to 8,000 miles in diameter.
655
00:37:34,275 --> 00:37:36,275
That's pretty big.
656
00:37:36,379 --> 00:37:39,896
We've only ever drilled
to about eight miles deep.
657
00:37:40,000 --> 00:37:43,034
We have no idea what's
at the center of the Earth.
658
00:37:43,137 --> 00:37:46,310
You know, we have theories that
there's this molten ball core,
659
00:37:46,413 --> 00:37:48,413
iron core spinning around,
it's magnetized or whatever,
660
00:37:48,517 --> 00:37:50,310
but we really don't know.
661
00:37:50,413 --> 00:37:52,862
There could be
a completely different world
662
00:37:52,965 --> 00:37:54,724
that we just don't
understand yet
663
00:37:54,827 --> 00:37:56,689
because we've never been there
664
00:37:56,793 --> 00:37:58,379
to do experiments
and science on it
665
00:37:58,482 --> 00:38:00,206
and understand what's going on.
666
00:38:00,310 --> 00:38:04,275
SHATNER:
If another world does exist deep beneath our own,
667
00:38:04,379 --> 00:38:08,655
is it possible we might be
able to one day access it?
668
00:38:08,758 --> 00:38:13,068
There are those who believe
that not only is the answer yes,
669
00:38:13,172 --> 00:38:16,448
but that humanity's
very future may lie
670
00:38:16,551 --> 00:38:19,931
not above ground but down below.
671
00:38:20,034 --> 00:38:24,758
As proof,
they point to a village in China
672
00:38:24,862 --> 00:38:26,275
where thousands of people
673
00:38:26,379 --> 00:38:29,551
are already living
deep underground.
674
00:38:40,931 --> 00:38:43,724
in the rural region of Sanmenxia
675
00:38:43,827 --> 00:38:46,137
lies an ancient network
of villages
676
00:38:46,241 --> 00:38:48,689
that exists entirely
underground.
677
00:38:48,793 --> 00:38:51,655
Millions of people have
lived and worked here
678
00:38:51,758 --> 00:38:53,448
spending their entire lives
679
00:38:53,551 --> 00:38:55,724
beneath the surface
for generations.
680
00:38:55,827 --> 00:38:58,172
And not just
thousands of years ago,
681
00:38:58,275 --> 00:38:59,793
in the ancient past...
682
00:38:59,896 --> 00:39:02,620
but to this very day.
683
00:39:02,724 --> 00:39:08,103
COLLINS:
Over the past 4,000 years
684
00:39:08,206 --> 00:39:10,551
there were tens,
685
00:39:10,655 --> 00:39:13,517
if not hundreds
of thousands of people
686
00:39:13,620 --> 00:39:15,965
living within these underground
687
00:39:16,068 --> 00:39:19,068
dwellings
in the northern part of China.
688
00:39:19,172 --> 00:39:22,689
And these places,
which are known generally
689
00:39:22,793 --> 00:39:24,344
as yaodongs,
690
00:39:24,448 --> 00:39:28,034
continue to be built
even to this day,
691
00:39:28,137 --> 00:39:30,758
and, in fact,
the modern examples
692
00:39:30,862 --> 00:39:33,000
created over
the last hundred years
693
00:39:33,103 --> 00:39:37,896
have got bathrooms,
they've got electricity.
694
00:39:38,000 --> 00:39:40,068
If you could imagine a sort of
695
00:39:40,172 --> 00:39:43,517
modern-day housing development
anywhere in the world,
696
00:39:43,620 --> 00:39:48,241
everybody had a basement and
you took all of the houses away,
697
00:39:48,344 --> 00:39:51,172
and all you were left with
was the basements...
698
00:39:51,275 --> 00:39:53,620
that's what
Sanmenxia looks like.
699
00:39:53,724 --> 00:39:56,241
It's these sort of rectangular
700
00:39:56,344 --> 00:39:58,689
holes in the ground,
like a chessboard,
701
00:39:58,793 --> 00:40:00,793
all over the place.
702
00:40:00,896 --> 00:40:03,793
SHATNER:
There are many living options
703
00:40:03,896 --> 00:40:06,241
in the underground dwellings
of Sanmenxia,
704
00:40:06,344 --> 00:40:09,586
ranging from simple
one-bedroom caves...
705
00:40:09,689 --> 00:40:12,068
to more elaborate
three-bedroom homes
706
00:40:12,172 --> 00:40:14,758
with modern appliances
and plumbing.
707
00:40:14,862 --> 00:40:19,137
But why would anyone choose
to live below ground
708
00:40:19,241 --> 00:40:23,379
in a country with several
thriving cities to choose from?
709
00:40:23,482 --> 00:40:25,689
One of the benefits
of living underground,
710
00:40:25,793 --> 00:40:28,586
especially in very hot
and cold climates,
711
00:40:28,689 --> 00:40:31,793
is below the earth, the
temperature is more moderated,
712
00:40:31,896 --> 00:40:33,931
so you don't get
the extremes so much.
713
00:40:34,034 --> 00:40:35,551
You know,
it's probably pretty cool
714
00:40:35,655 --> 00:40:37,241
most of the time and so,
715
00:40:37,344 --> 00:40:40,034
you know, they're
not bad places to be.
716
00:40:40,137 --> 00:40:43,241
COLLINS:
It could well be that with the expansion
717
00:40:43,344 --> 00:40:47,620
of population
at the rate that it is today
718
00:40:47,724 --> 00:40:50,000
that going underground
719
00:40:50,103 --> 00:40:54,793
is something that we should
look towards in the future
720
00:40:54,896 --> 00:40:58,344
to solving the problems
of housing
721
00:40:59,551 --> 00:41:02,379
and creating new cities.
722
00:41:04,206 --> 00:41:07,034
You have to wonder,
is the day gonna come
723
00:41:07,137 --> 00:41:08,896
when the Earth itself,
724
00:41:09,000 --> 00:41:11,103
at least from the perspective
of the surface,
725
00:41:11,206 --> 00:41:13,137
that the Earth simply will not
726
00:41:13,241 --> 00:41:15,965
be able to stand
any more people.
727
00:41:16,068 --> 00:41:18,586
So what's the answer?
728
00:41:18,689 --> 00:41:22,758
Maybe the answer is
that we all move underground
729
00:41:22,862 --> 00:41:27,068
or possibly
a significant percentage
730
00:41:27,172 --> 00:41:31,310
of the population
choose to go underground.
731
00:41:31,413 --> 00:41:34,965
Given everything going on
in the world today,
732
00:41:35,068 --> 00:41:36,931
will we live to see the day
when our civilization
733
00:41:37,034 --> 00:41:39,448
goes back underground?
734
00:41:39,551 --> 00:41:41,517
It certainly seems safer.
735
00:41:41,620 --> 00:41:43,793
And if that comes to pass,
736
00:41:43,896 --> 00:41:46,862
will we then learn
about all the other secrets
737
00:41:46,965 --> 00:41:50,724
the Earth is hiding
beneath its surface?
738
00:41:50,827 --> 00:41:53,793
It seems that the answer
will be one
739
00:41:53,896 --> 00:41:56,793
that for now remains buried,
740
00:41:56,896 --> 00:41:59,172
and... unexplained.
60096
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