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01x12 - Coming of Age in the Anthropocene

Episode transcripts for the TV show, "Cosmos: Possible Worlds". Aired: March 9 – April 20, 2020.*

01x12 - Coming of Age in the Anthropocene

Post by bunniefuu »

TYSON: Welcome

to the planet Earth.

A world of blue nitrogen skies,

oceans of liquid water and

more kinds of living things

than you can possibly imagine.

(baby fussing)

You are the newest page

in its four-billion-year-old

book of life.

We're all very young here.

New, like you, to the

mysteries of the universe.

We hope someday you

will add to the little we know.

I can see a future

for you that is,

in many ways,

longer and brighter,

and more free than any human

generation has ever experienced.

I also sense danger.

That's nothing new here.

It's always been that way.

To be alive is to be in

some measure of jeopardy.

Life is dangerous.

In every generation,

in every time,

everywhere on Earth.

Our species, and

our fellow Earthlings,

have gotten through

the tough times,

when the prospects

for life looked bleak.

Somehow, we manage to endure.

And now, we want to protect you,

and your 360,000 brothers

and sisters also born on this day.

I have so much to tell

you about our world.

Some of these

stories are frightening.

But don't be afraid.

We'll find a way.

(theme music plays)

♪♪

♪♪

Series brought to you by Sailor420

!!! Hope you enjoy the TV-Series !!!

TYSON: Where do I begin?

So much has happened

before you got here.

Fortunately, our ancestors

figured out a way to reach all

the way back in time to piece

together the great story of

our planet's own childhood.

And the amazing things

that have happened since.

It's called science,

and it's your birthright.

It's hard to believe that all of this

grandeur was once a sea of fire.

Come, I'll show you.

This time next year, you'll

have your first birthday.

That means you will have

completed one whole trip

around the Sun, which

is what an Earth year is.

To understand the vast

time scale of the cosmos,

and our little world, we've

squished all of time into the

scale of a single year.

And that's where we are now.

On the Cosmic Calendar.

Every month is a little

more than a billion years,

every day a little

less than forty million.

A single hour on this calendar

is almost two million years.

Earth was born in fire.

Fires within its seething heart.

And great ba*ls of rock and

ice that explode in fiery impact.

One was almost as big as Mars,

and when it struck

Earth, it formed the Moon.

But not to worry, little one,

because those fireballs were

part of the chaotic

early solar system.

In the billions of years since,

the other worlds swept

free the lanes of their orbits.

So our solar system is a

relatively peaceful place now.

After its first

half billion years,

Earth was spinning

faster than it does today.

The days were shorter,

merely six hours long.

The Moon was ten times closer,

and its gravitational grip on the

young planet was much stronger.

The shores of the land were

battered by the largest tidal

waves the world has ever known.

A thousand times greater

than they are today.

The infant Earth was

no place for us then.

The atmosphere was mostly carbon

dioxide, methane, and ammonia,

a toxic environment

for our kind of life.

We don't know what the

climate was like back then,

but scientists

reason that the thick,

hazy atmosphere trapped

the heat of the Earth and

made it scorching hot.

Another kind of life, tiny

creatures that could shrug off

the methane and eat carbon

dioxide and sunlight for breakfast,

found a way to make

a living in the ocean.

And those scrappy

little cyanobacteria,

as they're known,

remade the whole planet.

By gobbling up

the carbon dioxide,

and giving off oxygen,

they turned the sky blue.

All that oxygen destroyed

the methane shroud

that enveloped our planet.

And it was cool.

Not as cool as it is now,

but more like a really hot

summer day year-round.

And then something

wonderful happened.

The atoms of oxygen that

the tiny creatures in the ocean

produced began to gather

high above the world in the sky.

And a new kind of

molecule was made.

Ozone.

It created an invisible

canopy against those rays of

the Sun that were lethal.

Now, for the first time,

life was free to leave the

oceans for the land.

And before long, life seized

these new opportunities.

A wild variety of shapes and

sizes evolved as adaptations

to these new habitats.

And there were ears

and noses and wings.

I'd like you to meet

a fellow Earthling,

a very distant

relative of yours.

You've only been here a day,

but beetles have been

here for 300 million years.

And the changes they've

seen on this world

Our kind has only been here for

a fraction of that amount of time,

11:00 on New Year's

Eve of the cosmic year.

That's when our ancestors

stood up for the first time.

We call them h*m*

Erectus for that reason.

They were no longer forced to

stare at the mud beneath their feet.

Now, they could look

up and see the stars,

and their hands were

free to change the world.

They began to move

around, to explore,

daring to risk everything

to get to unknown places.

They were brave.

And their blood

runs in your veins.

Some of them explored

the vast continent of Africa.

Others ranged north,

taking a left turn into Europe.

There is evidence that they

would later evolve into the

lost people we

call Neanderthals.

We have no idea what

they called themselves,

but we named them after

the place in Germany where

we first discovered

their ancient remains.

Another even more

mysterious branch of our family

took a right turn into Asia.

And they evolved into

people we call the Denisovans.

But you and I,

and all our other human

brothers and sisters,

were mainly descended

from the people who stayed in

Africa for another

million and a half years.

Sure, most of us have a little blood

from the other branches of the family,

but we are mostly

the children of Africa.

To see how our kind

spread out around the planet,

we have to go even

closer to midnight.

11:55.

Or about 150,000 years ago.

It is now a minute

and a half to midnight.

Until about 40,000 years ago,

our Neanderthal relatives

lived very much as we did.

They had bigger

brains than we do,

and were brawnier,

but they did many of the things

that we think of as being human.

Most of us still carry some tiny

portion of their genes inside us.

But there are no more

living Neanderthals today.

Nor are there any

of our other cousins,

the Denisovans.

When this happens, when

a whole species vanishes

we call it extinction.

It's the end of a road that

began four billion years ago

with the origin of life.

We don't know why they died out.

We do know that they never

ranged beyond the ocean

coastlines of their environment.

Maybe our hominid cousins

were just a bit more contented,

less anxious and more

at peace than we are.

Maybe it's a restlessness

that prods us humans to

choose the unknown.

Some powerful force

moved our ancestors to daring

feats of courage.

They crossed great oceans with

no idea of what lay on the other side,

carrying our people to

every continent on Earth.

And even to the Moon.

By the last second

of the cosmic year,

there was no place on Earth

that we had left untouched.

We became the first species

to remake the planet since the

one-celled cyanobacteria

did billions of years ago.

To change the oceans, the

land and the atmosphere.

And these changes have

led to a new mass extinction.

The scientific community

has looked at the evidence,

and decided our age

needs a new name.

The Anthropocene.

"Anthropo" from

the Greek word for

"Human" and "Cene" the

Greek word for "Recent."

It reflects our global impact

on the environment and

the life it sustains.

There's disagreement

about when it began,

and nobody knows

how it will turn out.

Happy New Year, little one.

Welcome to the Anthropocene.

TYSON: I see a great

future for you, little one.

But a shadow hangs over it.

We're not exactly sure

when the darkening began.

When did we become a force

of nature, altering the skies,

the seas and the

land of the planet?

When did the age of

the Anthropocene begin?

Some would say that it

started in places like this one,

more than 10,000 years ago.

Did our ancestors paint

these images of mammoths and

saber-tooth tigers and giant

sloths to somehow keep their

memory alive after

slaughtering the last of them?

Human-caused

extinction is nothing new.

But we can't really

blame our ancestors.

How could they know

that this or that k*ll meant

the end of an entire species?

I wonder, maybe the

Anthropocene started with the

first seed that was

planted in the ground,

and the agricultural

revolution that followed.

Before that time, the world

had twice as many trees to

convert the Earth's

carbon dioxide into oxygen.

With the invention

of agriculture,

our ancestors stopped

wandering to settle down into

farms and cities.

This is Çatalhöyük.

It was one of

the earliest cities.

This is how it looked

about 9,000 years ago.

The great move indoors

changed our relationship to nature.

Those hearths, those

fires that warmed the small

dwellings of our ancestors

were they the beginning?

The smoke from those

small fires did little to

alter the atmosphere.

But over thousands of years,

our numbers grew exponentially,

until we were cranking

out enough carbon dioxide

into the atmosphere to

warm the whole world.

Did the Anthropocene begin with

the domestication of animals?

Cattle convert wild

grasses into methane,

another gas that

changes the climate.

It happens inside them when

they're digesting their meals.

But nobody would

figure this out until the

modern scientific era.

How could a few head

of cattle do any harm,

let alone change

Earth so radically?

Our ancestors wanted

to feed their families,

and make sure that the little

ones would not go hungry.

That they would live.

In China, around

4,000 years ago,

a world-changing

discovery was made.

There were rocks that you

could burn for fuel to drive

away the cold and the damp.

These rocks were actually the

carbon remains of plants and

trees that had died hundreds

of millions of years before,

and lay buried in the earth.

Was the discovery of coal the

beginning of the Anthropocene?

Coal became increasingly

important to power forges and

foundries and homes.

Or did the Anthropocene really

get going about 1,000 years later,

when people all over

Asia began to grow rice?

This ingenious technique,

which involves transplanting

seedlings into flooded paddies,

is called "Puddling."

There was no way for these

hardworking farmers to know

that this particular

method of growing rice,

like the cattle, would someday

produce tens of millions of

tons of methane per year.

The flooded soil loses

oxygen, and then tiny,

invisible creatures, microbes,

digest the plant matter

and produce methane.

The leaves of the rice plants release

more methane into the atmosphere.

These early farmers had

no way of seeing what was

happening on the

scale of the very small.

Again, they were just

trying to feed themselves

and each other.

There's all kinds of writing.

But this is how time writes.

If you know how to

read time's alphabet,

you can reconstruct events

in the great story of the planet.

The most dramatic passage

in this saga is not written in

the brightest colors,

but in pale white.

This pale white line is

kind of an epic poem.

It tells the saga of

the death of titans,

all over the planet.

This layer of an otherwise

rare metal called iridium,

signifies the end of the

Cretaceous chapter some

66 million years ago.

This is when dinosaurs,

and three quarters of all the

plants and animals

became extinct.

There's a custom

among geologists.

If you find a layer in

the earth that indicates

the boundary of the first or

last time that the fossils of

any species can be found,

you mark it with

a "golden spike."

You drive it into the

rock with a hammer.

If we are living in

the Anthropocene,

the age of human-

caused extinction,

what wall do we drive

our golden spike into?

It's in me, little one.

When I was brand new,

just like you, only a day old,

there were two great

superpowers fighting

over the planet.

They were both willing to

destroy everything to assert

their dominance.

On the very day I was born,

both nations exploded nuclear

weapons in the atmosphere

just to show how strong they were.

And those were only a few

of the thousands that were

detonated over a

period of decades.

The bombs gave off strontium 90,

an atom made unstable

by its excess nuclear energy.

It's called a

radioactive isotope.

It polluted mother's

milk all over the planet.

Mothers nursing babies like

you refused to live with this horror.

They joined together to protest

until a treaty was signed in 1963.

I, and my whole generation,

carry an excess of

another radioactive isotope

in the tissues of our bodies.

It's called carbon 14.

So if I ever lose my mind,

or forget how old I am,

the echoes of those

nuclear explosions on the day

of my birth would

tell you my age.

Does this "golden spike"

inside me signify the beginning

of the Anthropocene?

Is that when it began?

The atmospheric testing ended,

but we just kept on

trashing our home.

All the while knowing that

the day would come when

it would all fall down.

What good is it to know

of a danger if you don't do

anything about it?

Maybe it's better not to know.

Knowing can be a curse.

The stories that live the longest are

those that never were,

and always will be: myths.

Apollo, the

ancient god of light,

was always on the prowl

for attractive humans.

One day, while strolling

the bustling streets of Troy,

a rival city of the

Ancient Greeks,

he spied Cassandra, the

smartest and most beautiful of

the daughters of King Priam.

Apollo fell madly

in love with her.

Apollo usually got his way,

and he was shocked when

Cassandra rejected him.

How could he win her heart?

She lacked for nothing.

And she was happy.

But Apollo was not

so easily dissuaded.

And so he made her

an irresistible offer.

He would grant her

the gift of prophecy,

the ability to see the future.

Cassandra was thrilled.

Knowing what would happen

before anyone else would make

her all-powerful.

But then, Apollo explained to

her what he expected in return.

She would have to

submit to him as his lover.

This was too high a

price for Cassandra.

Apollo's rage took the form

of a cruel and ingenious curse.

He granted Cassandra the

ability to foresee the future,

but condemned her to be ignored.

The Trojans

thought she was nuts.

They contemptuously

referred to her as the

"Lady of Many Sorrows."

Today she would be

dismissed as a prophet of

gloom and doom.

Cassandra saw nothing but

trouble when her brother, Paris,

decided to take

a trip to Sparta.

She alone knew that

when he got there,

he would fall in love

with the King's wife,

a beauty named Helen,

whom he would abduct.

This would bring ruin to Troy.

But no one paid any attention.

This was a time of

peace and prosperity.

There was no clear

and present danger.

The King wouldn't

listen to his daughter.

No one would.

When Paris brought Helen home,

the people of Troy

celebrated her arrival.

Cassandra was so desperate

to prevent the coming

disaster that she

attacked Helen.

Cassandra knew that the

Greeks would seek revenge

against the Trojans, and

that they would be victorious.

She foretold the defeat

of her father's army,

and the sacking of

Troy by the Greeks.

And the Greeks did come,

just as Cassandra

knew they would.

But even after years of

warfare, Troy still stood.

When the Greeks retreated,

boarding their ships and

sailing out of the harbor,

there must have been a

sigh of relief among the few

who wondered if there was

something to Cassandra's

dire predictions.

But what about that

enormous wooden horse?

A Trojan platoon was

sent to investigate.

They found a

single Greek soldier.

A man named Sinon.

The Trojans asked

Sinon, "What's going on?"

He told them that a King of

the Greeks had wanted to offer

him up as a human sacrifice.

So he'd stayed

hidden until his brothers

departed for home.

And that colossal wooden horse?

Sinon told them that it was an

offering for the goddess Athena.

How wonderful,

the Trojans thought.

The horse was the

ancient symbol of their city.

Why not move it inside the

gates and keep it as a trophy?

Sinon laughed, and told them that

the Greeks had said it was way too big

and heavy for weaklings

like the Trojans to move.

"Let them stare at it all

day and be ashamed about

how feeble they are."

(horn)

(speaking in native languge)

(cheering)

♪♪

TYSON: The Trojans were

terrified that Cassandra's

attempt at arson would

enrage the goddess Athena,

and bring her wrath

down upon the city.

♪♪

Once the invaders

gave the signal,

the ships of the Greek navy

that had been waiting out of

sight offshore commenced

their attack on Troy.

(screams)

♪♪

Apollo had had his fun.

Cassandra's grim prophecies

had gone unheeded,

and now it was

too late for Troy.

For Cassandra,

knowing was a curse.

But it can also be the

greatest of blessings.

Let me tell you another story.

Once upon a time, there

were no refrigerators.

♪♪

TYSON: It used to be hard to keep

food from spoiling in the summertime.

There was a person

called the "iceman."

He would come to your house

and sell you a big block of ice.

You'd keep it in something

called an "icebox" to preserve

the kinds of food

that spoil quickly.

But that was a drag

because the ice kept melting.

It would drip all

over the floor.

So somebody thought up

another way to keep food cold.

It was a gas powered system that used

ammonia or sulfur dioxide as a coolant.

No more lugging blocks of ice.

What could be bad about that?

The chemicals were

not only poisonous,

they smelled terrible

and there were leaks.

A substitute coolant

was badly needed.

One that would circulate

inside the refrigerator,

but would not poison anyone

if the refrigerator leaked,

or pose a danger if it

was sent to the junkyard.

Something that

wouldn't make you sick,

wouldn't burn your

eyes, or attract bugs,

or even bother the cat.

But in all of nature, no such

material seemed to exist.

So chemists in the

United States invented a

class of molecules.

Little collections of even

tinier things called atoms,

that had never

existed on Earth before.

They called them

chlorofluorocarbons,

or CFCs, because they were

made up of one or more carbon

atoms and some chlorine

and/or fluorine atoms.

These new molecules

were wildly successful,

far exceeding the

expectations of their inventors.

(overlapping chatter)

Not only did CFCs become

the chief coolant in refrigerators,

but also in air conditioners.

There were so many things

you could do with CFCs.

People used them to propel great

fluffy mounds of shaving cream.

And to protect your

hair from wind and rain.

It was also the propellant

that made fire extinguishers

and spray paint

cans so much fun.

It was good for foam insulation,

industrial solvents

and cleansing agents.

The most famous brand name

of these chemicals was Freon,

a trademark of DuPont.

It was used for decades and no

harm ever seemed to come from it.

Safe as safe could

be, everyone figured.

Until, in the early 1970s, two

atmospheric chemists at the

University of California, Irvine

were studying

Earth's atmosphere.

Mario Molina was a

Mexican immigrant,

a young laser chemist.

Sherwood Rowland

was a chemical kineticist,

someone who studied

the motions of molecules

and gases under

varying conditions.

He was from a

small town in Ohio.

Molina wanted to

grow as a scientist.

He was looking for a project

that would take him as far

from his previous research

experience as possible.

He wondered.

What happens to those

Freon molecules when they

leak out of the air conditioner?

This was a time when the

Apollo astronauts were still

making regularly

scheduled trips to the Moon.

And NASA was contemplating

weekly launches of

a space shuttle.

Would all that burning rocket fuel

pose a danger to the stratosphere,

that place where Earth's atmosphere

meets the blackness of space?

And this is how science

works a lot of the time.

You set out to

solve one problem,

and you happen on

a completely different,

unexpected phenomenon.

Those wonderfully

inert, "harmless" CFCs,

the magic molecules of

shaving cream and hair spray,

didn't simply vanish when

we were done with them.

They had an afterlife

at the edge of space,

where they accumulated

in the trillions.

They were silently congregating

high above the Earth,

and they were up to no good.

Molina and Rowland were

alarmed to discover that the

CFCs had thinned the

protective layer that shielded

us from the Sun's

harmful ultraviolet radiation.

And it was getting

worse all the time.

When UV light hits

a CFC molecule,

it strips away the

chlorine atoms.

Once that happens, the

chlorine atoms start devouring

the precious ozone molecules.

It wasn't until our planet

developed an ozone layer,

about two and a

half billion years ago,

that it was safe for life to

leave the ocean for the land.

A single chlorine atom can

destroy 100,000 ozone molecules.

CFCs were in everything,

and the manufacturers couldn't

imagine a world without it.

The corporate response

to this danger was that the

science hadn't been settled.

People had a hard time

believing that we had become

powerful enough as a species

to endanger life on the planet.

They looked for non-human

causes for the loss of the

ozone in the sky.

One Reagan administration

official suggested that

everyone just wear more sunblock

and put on a hat and sunglasses.

But the scientists pointed

out that the plankton,

those tiny plants at the

base of the global food chain,

and the larger plants,

were unlikely to do so.

Molina and Rowland tirelessly

worked to warn the world.

ROWLAND: What's the use

of having developed a science

well enough to

make predictions if,

in the end, all we're willing

to do is stand around and wait

for them to come true?

TYSON: Rowland and

Cassandra would've had a lot

to talk about.

But then something

amazing happened.

There was a global outcry.

People all over the

world got involved.

In the 1960s, the women of

the world demanded an end to

atmospheric nuclear testing

because they didn't want to

nurse their babies

with poisoned milk.

Then, in the '80s, consumers

demanded that the corporations

stop manufacturing CFCs.

And you know what, little one?

The governments listened.

CFCs were banned

in 197 countries.

That's just about as many

countries as there are on this planet.

And that's why this is

one danger you can cross

off your worry list.

The ozone layer has been

getting thicker ever since.

But what would've happened

if Rowland and Molina

hadn't been curious

about the stratosphere,

or if their warnings had been

ignored as Cassandra's were?

By the time of

your 40th birthday,

the ozone would have

been all but gone from

the entire planet.

You would never have been

able to take your own little ones

out to bask in the sunshine.

The food crops would

have completely failed.

The herbivores,

those who live off them,

would have died out.

The carnivores would subsist

on their corpses for a while,

but ultimately they,

too, would be doomed.

If we continue to

safeguard the ozone layer,

it will be completely

mended by your 50th birthday.

I may not get to see it,

but I have imagined

what it might be like.

TYSON: One last

story, little one.

It's about another person

who had the power to

foresee the future.

His story remains unknown

outside the scientific community.

But even Apollo would've

envied his power of prophecy.

He foretold an epic tale

of things to come with

astonishing accuracy.

And every one of us,

including you, are in his debt.

He was born in a rural

part of Japan named Ehime,

which means "Lovely Princess."

A place of unspoiled

natural beauty.

But he spent much of his

childhood buried beneath the

surface of the earth.

The cruelest w*r the world

had ever seen had forced the boy

and the people of his small

town to hide in an underground

b*mb shelter.

At first, Syukuro Manabe,

or "Suki," wanted to be a doctor,

like his father and grandfather.

He discovered physics

and became enchanted by it,

but didn't think he

could do the math.

His grades were poor,

until he began to concentrate

on the questions that

interested him most.

Why is the atmosphere and

climate of Earth the way that it is?

He wondered why Earth

maintained the same average

global temperature

year after year.

What was keeping the

planetary thermostat set at that

particular temperature?

Was it possible to take all the

variables of the planet's climate

its atmospheric pressure,

cloud cover, humidity,

surface conditions,

ocean and wind currents;

and create a climate

model for the planet?

One that had the

power of prophecy?

Now remember, this was

before climatologists in Japan

had any access to computers.

He did these brain-numbing

calculations by hand.

In 1958, he was invited to

immigrate to the United States

by the US Weather Service.

Five years later, Manabe

was given access to

one of the first

"super computers."

When the great volume of

data about Earth's climate

crashed the entire

system, he was mortified.

It took him another four

years to assemble the evidence

for a bold and

tragic prediction.

There are broken branches

on the four-billion-year-old

tree of life.

And this is their monument.

Each hallway memorializes

the mass extinctions that

were so widespread that

life itself came close to dying.

The first five catastrophes

happened a long time

before we got here.

But the sixth is now,

and it has our name on it.

(growl)

(wind)

Sometimes prophecy comes as a

cry from the heart of a Trojan princess,

but it can also be the

dry-as-dust title of

a scientific paper.

Thermal Equilibrium of the

Atmosphere with a Given Distribution

of Relative Humidity.

Doesn't sound like,

"The sky is falling,

the sky is falling!"

But that's what it said.

Maybe this is where we

should place our golden spike.

Manabe and his colleague,

Richard Wetherald,

predicted how the temperature

of the planet would change as

a function of the increased

greenhouse gases humans pumped

into the atmosphere.

The scientists foresaw

precisely how the looming

catastrophe would unfold.

They saw far.

Into our own time, and beyond.

Some people still claim

the science is unsettled,

but if that's so, how was

it possible for Manabe and

Wetherald to correctly

predict the rise in Earth's

temperature across

more than 50 years?

And if it wasn't caused by us,

where was all that carbon

dioxide coming from?

The larger community of

climate scientists predicted

heightened flooding

of coastal cities, check.

The mass death of coral

reefs by ocean warming, check.

The increase in intensity of

catastrophic storms, check.

Lethal heat waves,

droughts and runaway wildfires of

unprecedented magnitude, check.

The scientists warned us.

What about your future,

your life, little one?

Your first day of kindergarten

was postponed until the

thermometer dropped below

the lethal temperature level.

When the wildfires came,

your family was forced to flee with

nothing from your childhood home.

Water was the

champagne at your wedding.

(wind)

(distant cries)

This doesn't have to be.

It's not too late.

There's another hallway,

another future, we can still have.

I promise to get you

there. We'll find a way.