All language subtitles for How the Universe Works - 3X05 Is Saturn Alive

Dazzling, legendary

It's the most beautiful planet
in the night sky.

But secretive saturn
has been holding out on us.

We learned a vast amount
about it,

And most of this
has been very surprising.

We thought we knew those bodies.
We had no idea.

Saturn boils
with extreme weather

And weird lights.

The rings ripple and twist,

Bullied by over 60
remarkable moons.

They are individual worlds.
They each have a story to tell.

This is
a planetary explorer's dream.

Today, saturn's moons

Are the hottest property
in the search for alien life.

If there's one place
in the solar system

I would put a bet that life
exists there right now,

I would choose saturn.

And on saturn's largest moon,

We may have already found it.

We've found some
curious things on titan,

And it might just be evidence
of life.

Saturn,
the jewel of the night sky,

Dazzles us with its beauty
and scale.

It's huge so big,

You could fit more than
700 earths inside it.

But don't let size fool you.

One of the most
interesting things about saturn

Is that it is so big compared
to how much stuff is in it,

That it's actually lower density
than water.

The old joke is that if you
could find a bathtub big enough

And fill it with water,

Saturn would float,
but it would leave a ring.

Other planets have rings,

But none so vast and glorious
as saturn's.

The journey from the outside
of the main rings

To the inside edge
is 66,000 miles

Over 2 1/2 times the distance
around the earth.

Yet this vast collection
of dust and ice particles

Is whisper-Thin
in places just tens of feet.

Saturn's rings are made up

Of mostly very small particles,
of ice and rock.

Some of the particles
are larger,

But for the most part,
no bigger than grains of dust.

Racing within the rings

And orbiting far outside them
are over 60 moons

Made from rock and water ice.

They range in size
from tiny snowballs

To worlds with active geology,

Liquid water...

weather systems,
and possibly even life,

A billion miles from the warmth
of the sun.

It's so cold out there,

We just thought there'd be
nothing there,

And we were so wrong.
We were so wrong.

Saturn's first shocker

Its wild weather.

The storms on saturn
are extremely violent,

Unlike anything we see
on the planet earth.

In fact, saturn has
the second fastest winds

In the entire solar system.

These winds race
through saturn's cloud tops

At over a thousand miles
an hour,

Four times faster than
earth's strongest cyclones.

And lightning bolts flash up
to 10,000 times more powerfully

Than those on earth.

Everything on saturn is
just so very, very much bigger.

I mean,
there are weather systems

That are as big or bigger
than the earth.

Saturn's ferocious
weather is surprising,

Because on earth,
weather is driven

By the heat energy of the sun.

The sun warms the land,
generating wind.

It causes the seas to evaporate,
creating clouds and rain.

Saturn lies too far from the sun
to feel the same warmth,

So the heat that drives
its weather

Must be coming
from somewhere else.

To understand
this mysterious heat source,

We need to go back
4 1/2 billion years...

to the birth
of the ringed planet.

The planets in our solar system

Emerged
from a vast, swirling cloud

Of ice, dust, and gas.

The same ingredients can still
be found on earth today

In places like iceland,

Where volcanic ash
mixes with icy glaciers.

If you wanna build
a giant planet like saturn,

This pile of raw material here
is a great visual analog.

There's a lot of oxygen
and hydrogen in the universe.

That makes water,
and that makes water ice,

And the stuff initially
that made the solar system

Is basically this stuff here.

It's dirty ice, water ice,
with a little bit of

Little bit of rocky and metallic
minerals left in there

Out there in the cold of space.

4 1/2 billion years ago,

A vast cloud
of dirty ice particles

Shrouded in hydrogen and helium
collapses under its own gravity,

And at the center,
a new star our sun

Sparks into life.

The heat of the new star
melts the ice closest to it

And blows away the gas, leaving
only rocky debris behind.

But farther out,
icy material and gas survive.

A boundary forms
a frost line

Between the rocky inner cloud
and the icy gas beyond.

Once you fire up that campfire,
if you will,

What would be left behind
in the inner solar system

Is gonna be this stuff

Silicate minerals you make
a planet like the earth from.

But far away from the sun,
where it's colder,

You cross the frost line,
and what's out there

Is still cold enough to maintain
the ice behind,

And there's a lot of it there.

At first you make sort of
a solid core of this material,

But when you reach
a critical mass,

You've got enough
gravitational influence

To start to directly draw in
some of the hydrogen and helium

In the interplanetary cloud.

Saturn's huge solid core,

Now 10 to 20 times
the size of the earth,

Generates relentless gravity
and draws in gas.

The bigger this gas ball gets,
the more material it sucks in.

Saturn's massive gravity
then gets to work

On its fledgling atmosphere,
compressing it.

And like any gas under pressure,
it gets hot

Seriously hot.

Even today, saturn's
high pressure atmosphere

Heats its core
to 21,000 degrees

Twice the temperature
of the surface of the sun.

And it's this heat rising up

Which forms
saturn's distinct bands

And drives its extreme weather.

Saturn's actually
rotating very quickly.

It's a large planet.

It rotates once on its axis
about every 10 hours.

So as the weather comes up
from the interior,

It gets smeared out into bands.

That's saturn's north pole.

The bands do something that at
first glance, seems impossible.

There is a gigantic vortex

A spinning region of air

That's shaped like
a perfect hexagon.

You have waves

Of pressure, density,
and temperature

That start to interact
with each other.

And these waves can actually
interfere

And become one big wave

That goes all the way
around the planet.

This giant wave settles

Into a long-Lasting pattern,
because below,

There's no rocky surface

To disrupt the winds
that form it.

They form a beautifully
defined regular hexagon.

It's one of the most spectacular
things about saturn.

It took robotic probes

To reveal the weird weather
on saturn,

But if these close-Up shots
of storms and lightning

Took scientists by surprise,

They were nothing compared
to the shock of what came next,

Because the rings are alive.

Imagine saturn
without its rings

Just a pale globe floating
in the darkness of space.

With rings, it's magical.

Undoubtedly, the one thing

That captures everyone
about saturn is the rings.

It's inspired fiction stories,
and it's inspired everyone

Who's looked at it
in the night sky.

When i was 4 or 5 years old,

My parents bought a small
department store telescope,

And i remember looking down
into that eyepiece

And seeing this perfect jewel
of a planet.

There's just nothing
better than this,

And you can just see the rings

Going around the planet
just perfectly.

They're just a gorgeous
elliptical race track.

From the eyepiece
of a small telescope,

The rings seem quiet and serene.

But up close,
it's a very different picture.

We know this thanks
to a space probe called cassini,

And over 10 years
of images like these.

Ice particles jostle
for position like stock cars,

Traveling inside the rings

At hundreds of thousands
of miles an hour.

These particles range in size
from chunks of ice

As big as houses
to the finest powder snow.

It wasn't until we went
to saturn

And stayed there with cassini
that we learned

Just how fiercely complex it is.

You have the gravity
of the planet itself

And all of these moons

Interacting with the rings
and the moons and the planet.

All of these things are
sculpting that entire system

On scales that are both
subtle and gross,

And it makes this magnificent
crown jewel of the solar system.

As small moons
go around and side,

The ring particles
dance around them in response.

We see areas of the rings
that get raised up

As the moon goes by.

Moons will even switch orbits
with each other,

So there's a lot
of dynamic stuff

Going on inside the rings.

Scientists believe
that from time to time,

Saturn's icy moons break up,

Adding new material
to the rings.

This means that the structure
of the rings

Is constantly evolving.

With cassini, scientists can
deconstruct the physics

Of this evolution,
and it's teaching us the rules

That make
the whole universe tick.

All the planets
in our solar system

Evolve from the same flat disc
of dust and gas

4 1/2 billion years ago.

Astronomers see similar discs
around young distant stars.

But even with our most
powerful telescopes,

We can't see planets forming.
They're too far away.

But saturn's rings
are right on our doorstep,

A veritable snapshot
of a mini solar system

Caught in the process
of formation.

Looking at the rings,

We're looking at the formation
of planets or bodies

In an arrested state
of development.

It's like you took
the beginning stages

Of the formation of the planets
but stopped it.

Cassini shows
structures forming spontaneously

Inside the rings.

They don't even
need to be tickled.

They don't need to be disturbed
into forming structures.

They form them on their own.

Does this tiny moon,

Captured
in the process of formation,

Show us how the earth
started its life?

You get something that
just happens to form

Out of random processes,
and that mimics what astronomers

Think they're seeing
in protoplanetary discs

Surrounding other stars
in the cosmos around us.

Cassini sees curious
propeller-Like structures

Inside saturn's broad a ring.

They're caused by ring particles
washing over tiny hidden moons.

The particles collide
with the moons,

Sending them into random,
ever-Changing orbits,

Sometimes closer to saturn
and sometimes farther away.

Perhaps similar forces
influenced the earth's formation

Around the sun,

Pushing it into closer
or wider orbits.

Saturn's rings
also help us understand

Why planets stop growing.

A walnut-Shaped moon
called "pan"

Sits near the middle
of saturn's a ring.

With so much ice around it
to gobble up,

Pan should be huge,
but it's tiny,

Only 20 miles in diameter.

If you have a moon embedded
in a disc of ring particles,

You might naively think
it just secretes ring particles

Until it grows into
a, you know, a bigger moon.

But actually we find
moons create gaps

In the ring around them.

So pan has created
the inky gap.

Daphnis has created
the keeler gap.

Rather than pulling
ring material in,

Pan appears to push it away.

As the moon passes

The slower moving material
outside it,

Pan's gravity flings
the particles out

Into wider orbits.

The faster material
inside pan's orbit is slow.

As it passes, the little moon,
causing it to fall away

Towards saturn.

This natural cutoff and growth
might explain why

Multiple planets
form around stars,

Instead of single giant planets
that eat the whole buffet.

Of all cassini's discoveries,

The most important is also
the most surprising

A tiny ice moon that may be
home to life.

For most of history,

The only moon we've been able
to study up close

Is our own.

Multiple deep craters
tell a powerful story.

Our moon is dead.

There's no active geology
or weather

To wipe away
these ancient scars.

But what about the moons around
other planets like saturn?

Are they dead, too?

Our first assumption
about saturn

Was that the moons
would be like that

Cold, dead, lifeless relics
from the early solar system.

It wasn't until we invented
spacecraft

That could go to these moons
that we discovered

How incredibly diverse
our solar system truly is.

Take enceladus

An ice moon
barely 300 miles across.

Nobody paid it any attention
a decade ago.

But today,
it's a geological rock star.

And this is why.

Enceladus orbits inside
saturn's outer most ring

The e ring.

The e ring puzzled scientists
because they couldn't figure out

How a ring so broad
and so diffuse

Could hold itself together.

The cassini team decided to take
a close fly by of enceladus

To solve the mystery.

Did it have something to do

With keeping
the particles together?

What was the connection between
the e ring and enceladus?

Well, now we know that enceladus
is actually responsible

For the e ring being there
in the first place.

2005, cassini captures
an astonishing sight

A hundred geysers shooting
ice particles miles into space

From cracks in the south pole.

Enceladus is hurdling its guts
into space at a colossal rate.

As enceladus orbits saturn,

These icy plumes
feed a vast shimmering halo

Around the planet

The mysterious e ring.

This icy plume also interacts
with saturn's magnetic field,

Causing a plasma cloud
of charged particles.

The particles race along
saturn's magnetic field lines

And slam
into saturn's polar atmosphere,

Raising
huge ultraviolet auroras.

Geysers explain the e ring,

But how can they exist
on a frozen moon

A billion miles from the sun?

On earth, geysers form
in highly volcanic places

Where water comes into contact
with hot rocks.

Enceladus, so small,
and so far from the sun,

Should be cold and dead.

But thanks to saturn's gravity,
it's not.

The source of the heating
on enceladus

Is the eccentric orbit
of that moon.

Sometimes it's a little closer
to saturn,

Sometimes it's a little
further away.

And that heating on enceladus
from that kneading

Gravitationally making the moon
stretch and pull

Is what warms the interior,

Causing the activity
on enceladus that we see today.

The gravitational
pull of saturn

Reaches deep into enceladus
beyond its water-Ice exterior

Gripping its rocky core.

As saturn's grasp
strengthens and weakens,

It massages
this cold, rocky heart,

Bringing it to geological life
with frictional heat.

The heat melts the ice
around it,

Creating a vast subsurface lake

At the southern pole
of enceladus.

This water jets out through
huge cracks in the surface ice.

On earth,
where there's liquid water,

There's life.

Could enceladus
have what it takes

For simple organisms to exist?

Once cassini saw these geysers,
the scientists knew

They had found something
extremely wonderful.

They actually changed
the mission of cassini itself,

Changed its trajectory.

We sent the cassini spacecraft
to fly very, very close

Over these cracks where
the water was rushing out.

Scientists clung
to the faint hope

That the water would contain
salts and organic molecules

Like ammonia,

The building blocks of life
here on earth.

Stunningly, cassini's censors
tasted all of them in abundance.

In that plume,
there's organic material.

It's not water.
It's a soup.

That's incredible.

All the main requirements
for habitability,

Energy source, liquid water,
source of biological nitrogen

And ammonia, organic material,

And the samples are coming up
into space.

There's a big sign
free samples, take one.

There could be life
that could've evolved there.

Now we don't know.
We haven't seen it.

But the conditions there
are as good there now

As they were on earth
3 billion years ago

When life arose here.

The sensational
realization that enceladus

May harbor life
has sparked intense debate

About future missions
to find it,

Because it has a rival for those
precious research dollars.

Saturn's largest moon, titan,
could also be home to life

Bizarre life.

And we may have
already found it.

More than 60 moons
orbit the planet saturn,

But one dwarfs them all.

Titan is a colossus,
bigger than the planet mercury.

A thick orange haze hides
its surface from our telescopes,

And when the cassini mission
first appeared beneath

Titan's orange cloak,
it revealed a world weirder

Than we could
ever have imagined.

Titan is an amazing place.

And of all the things
going on around saturn,

Titan might be
the most exciting of all.

Titan has mountains
and deserts, rivers and lakes.

Only the earth can match it
for geological diversity.

But here, water ice
takes the place of bedrock,

Frozen at 300 degrees
below zero.

And instead of water,

The rivers on titan
flow with methane.

This is a place where it
actually rains liquid methane,

Liquid natural gas.

This liquid is filling up
rivers and lakes.

This makes titan
incredibly special.

It's only the second world
in the solar system

Where we know
there's liquid on the surface.

And like earth,

Titan has a thick nitrogen-Rich
atmosphere.

But instead of the oxygen
we breathe,

Titan's air is spiked
with carbon-Rich molecules

That stain it a dull orange.

It's a soup of methane
and ethane and propane

And acetylene.

Uh, the list of
organic molecules is literally

Hundreds, hundreds long
that we've detected there.

Titan's complex cocktail

Of atmospheric chemicals
intrigue scientists.

But it also puzzles them,

Especially methane gas, which
rapidly decays in sunlight.

So even a billion miles
from the sun,

Titan's thick haze
should've lifted long ago.

A vast source of methane
must be replenishing

The orange smog.

Before cassini,

Scientists assumed
the whole of titan

Was covered
in massive impact craters.

Perhaps crater lakes
filled with liquid methane

Were evaporating
into the atmosphere,

Supplying the missing gas.

To help prove this theory,

Cassini carried a hitchhiker
all the way to saturn.

The huygens lander released
high above titan's equator

Parachuted through the clouds,
snapping photographs as it fell.

As it went
through the atmosphere,

It took a huge amount of data

And then landed on the moon
itself and took pictures.

When we first saw
those pictures,

It was life-Changing.

There were no craters.

It looked like flowing liquid
had once shaped the landscape,

But at the landing site
and as far as huygens could see,

That liquid was long gone.

Huygens landed in a spot
almost identical

To what we're standing on
right now.

If we look all around,

We can see this bleak,
barren landscape.

We see pebbles and cobbles

That have been rounded
and smoothed

Because they've come through
river channels.

We see plenty of those
at the huygens landing site.

Uh, in addition to that,
we see lots of sand.

The desert
huygens landed in is huge.

It stretches all the way
around titan's equator...

with 300-Foot tall dunes
sculpted by the wind

Just as they are on earth.

If the vast crater lakes
weren't at the equator,

They had to be at titan's poles.

Cassini scheduled a number
of additional flybys

To look for any signs of liquid.

One of the instruments
onboard cassini

Is basically a radar gun.

It shoots radar waves at titan,
and they get reflected back.

After two years
of hunting with this instrument,

Scientists finally got
the signal

They were waiting for.

One of the things it found

Is that near
the north pole of titan

Were regions
that were not reflecting radar,

And that sounds a lot
like liquid.

Liquid absorbs that energy
and doesn't reflect it back.

Later observations clinched it.

When cassini finally imaged

The north polar regions
of titan,

It it finally saw these lakes
and seas of methane

That we'd been looking for,

Only they weren't contained in
impact craters like we thought.

Instead they're contained
in big lake basins

That look just like
they do on earth.

Basin lakes like this one
in mono county, california,

Form in the depressions leftover
from tectonic activity.

These geological features
on titan

Could only mean
one shocking thing

The moon was alive
with geological activity.

If we were sitting
on the margins of kraken mare,

Which is the largest sea
that we see on titan,

Then we would probably see something
very similar to this landscape.

We would look out across
a fairly calm surface,

We think the winds
are not very strong on titan.

And so we'd have this calm lake
of methane and ethane.

And in the distance we would see
hills and mountains

That have formed on titan

Probably through
tectonic processes

In much the same way that
mountains are built on earth.

Except on titan, it's so cold,

The volcanoes spew water,
not lava.

And the mountains
and lake basins are solid ice.

At first, scientists thought
that methane evaporating

From these lakes generated
titan's smog.

But when cassini flew by
to measure the lakes again,

The levels appear to be
the same.

The lakes didn't look like
they were evaporating at all.

Scientists were stumped.

Either the lakes
weren't the source

Of atmospheric methane

Or they were somehow
being refilled.

Planetary geologist,
jani radebaugh,

Believes a crucial clue
to the missing methane

Lies in the formation
of rocky deposits called tufa.

They're found here at mono lake,

Where clean spring water
rises up from the ground

Into the mineral-Rich lake
where the two water types react.

This is very exciting
because this could be a clue

To the missing methane on titan.

So it's rock that has been
formed from the chemicals

Contained in two fluids.

There is water that's emerging
at the margin of the lake.

It's interacting
with the lake water

Which has
a very different chemistry

And all of the chemicals
that are dissolved

Combine with each other
and create this rock.

Radar images
of titan's largest lake

Reveal rocky structures
around the margins

That look just like
mono lake's tufa.

Titan's tufa,
if that's what they are,

Could be evidence of a layer
of liquid methane

That sits
above titan's frozen core

And rises and springs
to feed its lakes

Just like spring water
rises to feed mono lake.

So when
those methane springs come in,

They interact with the lakes
and a rock precipitates out.

So we see these organic rocks

Dotting the margins
of the lakes.

And almost certainly
there's also methane

Just bubbling up and emerging

At the margins of the lake
as well.

If jani is right,

Titan's lakes do evaporate,
feeding the atmospheric smog,

But they're constantly
replenished

By underground methane springs
replacing the lost fluid.

Titan is no dead world.

It's alive with active geology
and complex chemistry.

And it might be alive
with something else

Something really big.

We used to think
that saturn was too far

From the sun and too cold to
play host to anything dramatic.

We could not have been
more wrong.

The planet boils and bangs
with active weather

Storms, lightning, and auroras.

The rings constantly evolve.

And the moons aren't the frozen
snowballs we expected.

They're shaped by active geology
with warm water geysers

And lakes of liquid methane.

And now
on saturn's largest moon, titan,

Scientists may have uncovered
the first tangible evidence...

of extraterrestrial life.

Our search for life has been

Focused on liquid water
follow the water.

I think it's a good strategy.

But i think we are limiting
ourselves if we think that

That's the only place to look.

I think liquids may be
interesting

Even if they're not water.

Astrobiologist, chris mckay,

Believes that life on titan

May have evolved to live
in liquid methane,

Not liquid water.

But titan is so cold,

Simple life would play by
a very different set of rules

Where bigger is better.

When we go to other worlds,

We're gonna be looking
for bacteria,

And we assume that
they're gonna be very small.

But you could ask the question,
why are bacteria so small?

Well, i think the answer is
because they live in water.

On earth,
bacteria don't need to grow big

In order to thrive.

Water dissolves almost
everything,

So it provides
a nutrient-Rich environment

Where small and simple
bring success.

You go to titan where
the liquid is liquid methane,

Liquid ethane,
very different from water.

There's no reason an organism
should be small.

In fact, quite the opposite.
It should be huge.

Mckay envisions
enormous single-Celled organisms

Around titan's shores,
looking like sheets of paper.

Their huge surface area
would maximize

The uptake of food from the
nutrient-Poor liquid methane.

I predict
if there's life on titan

Living in liquid methane, you won't
need a microscope to see it.

You'll need a yardstick.

When cassini released
the huygens probe

High above the cloud tops
of titan,

Mckay realized
he had an opportunity

To bolster his theories
of life on the surface.

His methane-Loving life-Forms
must be eating to survive.

Perhaps
huygens' delicate sensors

Would pick up evidence
of ground level feasting.

As huygens was on its way
to titan,

I'm sitting in a hotel room
writing up a paper saying,

Hey, what if there's life
on titan?

What would it eat?
And how would we detect it?

How would this probe
flying through the atmosphere

Detect it?

Literally the day
huygens landed,

I submitted this paper
to the journal,

Predicting that
if there was life on titan,

It would eat hydrogen
and the probe

Would be able to measure
this depletion of hydrogen.

So let's look for hydrogen.

Huygens parachutes
through titan's atmosphere,

Sampling the gases as it goes.

The upper atmosphere
has plenty of hydrogen,

So do the middle layers,

But at ground level,
there's a surprise result

An apparently drop-Off
in the concentration

Of hydrogen in the air.

Something or perhaps someone
was using it up.

When i heard a report that there
was a depletion of hydrogen,

I my heart raced
'cause i thought,

If this is
if this is hard data

For depletion of hydrogen,

I can't imagine any other way
besides biology to explain that.

It's exciting in that
it's consistent

With what we predicted,

But we have to wait for this
to be confirmed

By other calculations,
by direct measurements,

And so on.

If future missions
can confirm methane-Based life

On titan, it will surely be
the greatest discovery

In the history of science.

Because this low temperature
biology must have arisen

Independently of life on earth.

If we discover life,
let's say on mars,

There will always be
the possibility

That rocks and ice
and bits of material

Could've been exchanged.

But the chances of that
happening from earth

All the way to saturn
are next to nothing.

If we find a second example
of life in our solar system

Especially in a place
like titan

Which is so alien to the earth,
so cold and so different,

That tells us something
excruciatingly important.

And that is that life must be
everywhere in the universe.

Robotic missions
offer tantalizing hints

Of simple life
on enceladus and titan.

But is saturn's realm only fit
for giant bacteria

Or is it a place we humans
could one day call home?

Saturn orbits
a billion miles from the sun.

So far out it takes an hour
for its reflected light

To reach our eyes.

Yet the future of
our civilization

May rest on humans
one day colonizing the moons

Surrounding this
gas giant planet.

It won't be easy,
but saturn has something

Worth the trouble

A magical source of fuel
called helium-3

That can satisfy our increasing
hunger for energy

For millions of years.

Some futurists believe
that we have to have

A commercial incentive
to going to saturn.

Not just to mine the minerals
of the moons of saturn,

But also to harvest fuel
in the form of helium-3.

Helium-3 is a rare substance
that we can use

In fusion engines to provide
perhaps unlimited energy.

Helium-3 may very well
replace oil as the fuel

To take us
into the centuries to come.

With its single neutron
and twin protons,

Helium-3 is uniquely suited
to a form of energy production

Called fusion

The same process that burns
in the heart of a star.

When two nuclei
are crushed together

Under enormous pressure,
they fuse,

Creating a new heavier atom
and a burst of pure energy.

Best of all,
helium-3 doesn't release

Any of the harmful radiation

Associated
with other fusion fuels.

The only trouble
with helium-3

There's precious little
to be found on earth.

Now you could find some
helium-3 on the moon,

But the major supplies
of helium-3 in our solar system

Are located in the atmospheres
of the giant planets.

I call the gas giants

"The persian gulf
of the solar system"

Because they are the location
of its primary energy resources

Outside of the sun.

The gas giants provide

A near inexhaustible supply
of helium-3.

But how could we extract it?

Jupiter has the most.

But the planet's immense gravity
and dangerous radiation belts

Make it a no-Go for mining.

Neptune and uranus are way
too far away to be practical.

That leaves saturn
with relatively low gravity

For such a big planet.

And far lower levels of deadly
radiation than around jupiter.

If we're gonna have a future
human economy based on

Using controlled fusion
and helium-3,

Saturn is the destination
of choice.

Futurists envision
winged drones flying through

The upper atmosphere of saturn,
scooping up gases.

But where to process
this super fuel?

The ideal base of operations
would clearly be titan.

With gravity as gentle
as our moons

And a thick earth-Like
atmosphere,

Titan is surprisingly suitable
for a human outpost.

We could have huge dome
settlements on titan.

They would not have to be
strong enough to hold pressure.

They could just be thin,
inflatable membranes.

You could have dome cities
like you see in science fiction

Which are really not possible
in places like the moon.

Walking out
onto the surface of titan

Would be much easier
than on the moon or on mars.

The pressure on titan
is kind of nice.

It's 1 1/2 times earth pressure.

You would need a source
of oxygen.

And you need a very warm coat.

But it wouldn't feel as cold
as you might think

Because the atmosphere is calm
and there's not strong wind.

I think a coat like you might
wear in antarctica

Might be adequate.

So you can imagine somebody
stepping out of the spaceship,

Having a parka on, a mask,
like a s.C.U.B.A. Mask

To provide oxygen,

And literally walking out
on the surface.

Titan's low gravity
and dense atmosphere

Could even send us soaring
from place to place.

Let's say you had, you know,

It's a little bit
of a wing on your arm,

And you started to flap
your arms.

Remember it's almost like
you're you're on the moon,

But with a thick atmosphere.

And you'd really be able
to lift yourself

Off the surface, maybe fly,
just a little bit.

When the helium-3
trade route has opened

And the earth becomes
a fusion economy,

A new generation of rockets

Will open up interplanetary
travel to everyone,

Taking humans
to mars and jupiter,

Not in years, but in months.

And helium-3 might even power
adventure tourism

To saturn itself.

You can imagine
in a hundred years

When space travel is
easy and there will

Be hotels orbiting
the moon and mars

And everything,
what would be the one?

What would be the place,
right, to go?

It would be saturn.

I would hope one day that
there is such a thing

As space tourism and people can
visit places like enceladus.

It should be called

The enceladus interplanetary
geyser park

Because it would be a phenomenal
place to just go visit.

Standing on enceladus
would be an amazing sight.

All of this frost condensing
back out on the surface

Makes an incredibly
brilliant white.

It's got some of the
best powder snow for

Skiing anywhere in
the solar system.

You could get
close enough to actually

See the individual rings,

Maybe even see the little moons
in the gaps sculpting

And pulling and pushing
and prodding,

Shepherding
those ring particles around.

You could go back
over and over again,

And it would always be alien
and exotic and exciting.

From a cold, dead
jewel in our telescopes

To a place alive
with magic and mayhem

Saturn and its worlds
have come alive

And may harbor life itself.

Someday soon, this planet
could remake our universe,

And nothing will ever
be the same.