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Download "How Earth Made Us HD Full Episode | 4of5 Fire | 5.1 HD Geology Documentary | Iain Stewart"

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00:00:00
[Music]
00:00:06
our planet has immense power and yet
00:00:13
that's really mentioned in our history
00:00:16
books
00:00:19
I'm here to change that
00:00:25
I'm looking at four ways the power of
00:00:28
the planet has shaped our history
00:00:35
[Music]
00:00:37
the deep earth that provided the raw
00:00:40
materials for a conquest of the planet
00:00:46
wind
00:00:48
that has influenced the rise and fall of
00:00:51
Empires water our struggle to control it
00:00:59
has defined the character of
00:01:01
civilizations but this week I'm looking
00:01:07
at fire it's deadly yet it's also the
00:01:13
driving force behind human progress
00:01:18
but our dependence on fire has met the
00:01:22
events deep in Earth's past and changed
00:01:25
the course of history
00:01:31
[Music]
00:01:55
the vibrate is a lower limit let you
00:01:57
know when you're at a quarter tank
00:01:58
oxygen okay so when you hear that get it
00:02:02
get out get it
00:02:04
I'm preparing to undergo an experience
00:02:07
that on the face of it is absolutely
00:02:09
terrifying these stickers are to measure
00:02:13
the temperature that reaches inside the
00:02:15
seat in City these will tell you how hot
00:02:17
you're actually getting inside the suit
00:02:19
so how hot does it go to 130 degrees
00:02:21
Fahrenheit
00:02:25
[Music]
00:02:32
my suit is eight layers thick its visor
00:02:37
specially tempered gold-plated glass
00:02:42
and I've got my own air supply
00:02:46
this is what it takes to survive just a
00:02:49
few seconds
00:02:52
inside the heart of a fire
00:03:15
[Music]
00:03:18
the temperature our only is 1600 degrees
00:03:22
Celsius
00:03:25
[Music] [Applause]
00:03:34
for all its danger fire is compelling
00:03:38
almost hypnotic
00:04:14
Oh scary erected yeah that was good no
00:04:21
no no I feel my arms falling no noodle
00:04:25
right oh that is not a place where
00:04:30
humans should be but were you happy when
00:04:33
you're going through and you see the
00:04:34
flames licking up in front of you it's
00:04:37
the raw energy of it absolutely in
00:04:40
transfer unbonded I mean actually my
00:04:42
over all right stop it
00:04:44
hahaha he's bonded I think I should get
00:04:53
the paradox of fire is that it's lethal
00:04:57
and yet we depend on it completely
00:05:02
fire generates our electricity
00:05:09
it drives our machines
00:05:13
we use it every day
00:05:21
but the history of a relationship with
00:05:24
fire reveals how the earth has exerted
00:05:27
enormous power over the fate of peoples
00:05:30
and nations
00:05:42
it's strange to think that for 90% of
00:05:46
Earth's history there simply was no fire
00:05:51
earth was a barren planet of dust and
00:05:55
rock there was nothing to bone not until
00:06:00
relatively recently about 400 million
00:06:04
years ago that fire first appear
00:06:08
[Music]
00:06:12
the key to this transformation
00:06:15
vegetation the first land plants had
00:06:20
just appeared
00:06:25
and they provided fuel for fire but
00:06:31
plants did something else as well every
00:06:34
kid likes to climb trees and the great
00:06:36
thing about being grown up is the trees
00:06:38
they just get bigger and their ways to
00:06:40
get up them just gets fancy vegetation
00:06:47
supplied a second crucial ingredient for
00:06:50
fire
00:06:51
you can see how up here in the forest
00:06:55
canopy going on all around me is a
00:07:01
chemical reaction photosynthesis is
00:07:04
happening and here in the leaves
00:07:06
what forest synthesis is producing as a
00:07:09
waste product
00:07:10
is an essential ingredient for fire
00:07:13
oxygen flames cannot bond unless at
00:07:20
least thirteen percent of the atmosphere
00:07:22
is oxygen but the Earth's early
00:07:26
atmosphere had always none
00:07:33
[Music]
00:07:37
photosynthesizing plants use sunlight to
00:07:39
convert carbon dioxide into energy and
00:07:43
in the process released oxygen by around
00:07:50
four hundred million years ago this
00:07:53
process had raised the level of oxygen
00:07:55
in the atmosphere to that critical 13%
00:08:02
[Music]
00:08:05
now there is only one more thing needed
00:08:07
for fire to start a spark
00:08:19
starting fire was actually the easy bit
00:08:23
lightning storms have raged enough for
00:08:26
almost its entire history
00:08:29
thirty thousand bolts of lightning hit
00:08:32
the ground every hour
00:08:56
for hundreds of millions of years
00:08:59
wildfires were controlled only by the
00:09:01
forces of nature they started
00:09:05
spontaneously spread freely
00:09:10
[Music]
00:09:16
and only stopped when they ran out of
00:09:19
fuel or the rains came
00:09:27
[Music]
00:09:29
but then something changed we came along
00:09:41
around one and a half million years ago
00:09:44
early humans learnt how to control fire
00:09:49
[Music]
00:09:52
our distant ancestors probably foster
00:09:55
captured fire by grabbing a bonding
00:09:58
stick from a wildfire and keeping it
00:10:01
nourished Fanning the flames to keep it
00:10:04
alight it was the beginning of a
00:10:10
relationship that would transform the
00:10:12
planet and us
00:10:18
[Music]
00:10:22
in that sense fire is the human
00:10:26
signature
00:10:30
it gave us a man's power over our world
00:10:35
[Music]
00:10:44
cooking greatly expanded the range of
00:10:47
foods available to us
00:10:49
[Music]
00:10:52
it gave us warmth and light and
00:10:56
protection against hungry predators it
00:11:00
allowed us to quickly clear large areas
00:11:03
of land
00:11:04
[Music]
00:11:10
fire was the weapon that began a
00:11:12
conquest of the planet
00:11:22
[Music]
00:11:28
fire was so central to survival perhaps
00:11:32
it's no surprise that it was worshipped
00:11:34
by some early civilizations in the
00:11:40
Middle East one of the oldest religions
00:11:42
in the world
00:11:43
Zoroastrianism grew up around the
00:11:46
worship of fire
00:11:50
Prabhas or Oh Austrians the flame itself
00:11:53
was sacred humans have always been drawn
00:11:58
to fire flames have long been a symbol
00:12:01
of a spirit far greater than ourselves
00:12:03
almost that divine presence
00:12:08
[Music]
00:12:10
to this day the eternal flame is still a
00:12:14
potent symbol for the world's great
00:12:16
religions
00:12:23
[Music]
00:12:28
but the greatest landmark in our use of
00:12:31
fire came about 6,000 years ago
00:12:37
the breakthrough centered on an
00:12:40
extraordinary element carbon this is
00:12:47
carbon in its purest form diamond this
00:12:58
particular stone is 25 carats and
00:13:01
apparently it's worth 3.3 million pounds
00:13:06
it's absolutely beautiful diamonds are
00:13:14
made under extreme pressures and
00:13:16
temperatures deep in the earth
00:13:20
[Music]
00:13:22
I've always loved the idea that the
00:13:25
ultimate in glitz was to adorn ourselves
00:13:28
in tiny pieces in the Earth's interior
00:13:31
geological bling
00:13:33
[Music]
00:13:37
but there are other forms of carbon that
00:13:39
are far more valuable to us than this
00:13:44
because carbon is the basis for all life
00:13:48
on Earth
00:13:50
[Music]
00:13:55
and it's the key ingredient in fire and
00:14:04
once again it depends on photosynthesis
00:14:09
plants use the sun's energy to extract
00:14:12
carbon from carbon dioxide in the
00:14:15
atmosphere and use it to create their
00:14:17
living tissue it is this carbon that
00:14:20
bonds in a fire releasing the energy
00:14:23
that originally came from the Sun as
00:14:26
heat the more carbon richer fuel is the
00:14:33
more heat it produces
00:14:34
[Music]
00:14:39
normal wid files burn at about 700
00:14:43
degrees Celsius but 6000 years ago our
00:14:47
ancestors discovered the trick of
00:14:49
burning wood in a low oxygen environment
00:14:53
it only partially bonds but in doing so
00:14:57
it creates a much pure carbon rich fuel
00:15:02
charcoal
00:15:08
and that can bond at 1,100 degrees
00:15:11
Celsius
00:15:12
[Music]
00:15:16
hot enough to melt metal out of rock
00:15:21
the invention of metal smelting
00:15:24
culminating in the use of iron was one
00:15:27
of the most critical turning points in
00:15:29
human history the age of metals had
00:15:33
begun
00:15:42
our mastery of metal give us tools
00:15:49
money and weapons
00:15:53
[Music]
00:15:56
it was the foundation on which human
00:15:59
progress was built
00:16:03
[Music]
00:16:06
so much so that by the middle ages the
00:16:09
production of charcoal for iron smelting
00:16:12
was a major industry
00:16:18
but there was an inevitable problem
00:16:23
people began to run out of wood in
00:16:33
prehistoric times Britain had been
00:16:36
almost completely covered in forest but
00:16:39
by the end of the sixteenth century
00:16:41
ninety percent of the ancient woodland
00:16:44
had gone in London which was growing
00:16:47
fast the shortage of accessible wood
00:16:50
meant that the price rocketed
00:16:58
around the growing cities of Europe and
00:17:01
Asia similar fuel shortages developed in
00:17:05
fact the end of the sixteenth century
00:17:07
was the world's first great energy
00:17:11
crisis in many societies the demand for
00:17:17
energy had reached the limits of what
00:17:19
photosynthesis could provide a new
00:17:26
source of carbon was needed and the
00:17:31
planet had a solution
00:17:40
the answer to the energy shortage
00:17:43
started out in cold wet places like here
00:17:50
in Oregon in the western United States
00:17:56
you know this looks like a perfectly
00:17:58
ordinary a very beautiful leg but these
00:18:01
waters hold a secret because down there
00:18:04
is a lost world and a very cold one
00:18:15
melting glaciers keep the water clear
00:18:26
ghostly shapes appear in the distance
00:18:31
standing like sentinels but this is not
00:18:36
their natural home
00:18:40
these are 3000 year old tree trunks the
00:18:45
remains of a droned forest
00:18:47
[Music]
00:18:58
they were submerged when lava from a
00:19:01
nearby volcano dam this valley and
00:19:04
created the lake because the trees are
00:19:25
underwater there is no oxygen to help
00:19:28
rock them away instead they are
00:19:32
preserved and eventually buried in mud
00:19:35
at the bottom of the lake the start of a
00:19:40
long transformation which turns wood
00:19:42
into something very different
00:19:51
[Music]
00:19:54
oh and I was a crema absolutely freezing
00:20:04
hey guys today there are precious few
00:20:07
places were whole forest die and get
00:20:09
preserved but 300 million years ago this
00:20:14
was happening right across the globe
00:20:17
we just thought warmer than
00:20:19
[Applause]
00:20:28
300 million years ago trees dominated
00:20:32
the planet
00:20:33
many of these forests were in low in
00:20:36
swamps
00:20:37
[Music]
00:20:43
so when the trees died they fell into
00:20:46
the water in fact so many carbon-rich
00:20:50
trees were buried at this period in the
00:20:53
Earth's history is known as the
00:20:55
Carboniferous the age of carbon
00:21:03
eventually these drone trees would be
00:21:05
squeezed and cooked deep inside there
00:21:07
and turned into something new and
00:21:10
different
00:21:16
cool
00:21:19
Cole was to change your relationship
00:21:22
with fire in a fundamental way
00:21:27
instead of bonding carbon from the
00:21:29
present call gave us access to a huge
00:21:33
new source of carbon from the Earth's
00:21:36
past call wars in essence and a men's
00:21:40
store of fossilized sunshine
00:21:43
[Music]
00:21:46
but Cole wasn't evenly distributed
00:21:49
across the earth and this meant that
00:21:52
from the 17th century onwards the planet
00:21:55
began to play a new and crucial role in
00:21:58
human history the first place to benefit
00:22:02
was a small North European island
00:22:06
Britain Britain was lucky it had an
00:22:11
abundance of coal
00:22:12
much of which could be easily collected
00:22:14
from the surface
00:22:23
from the beginning of the 17th century
00:22:26
burning coal began to replace wood in
00:22:29
homes and workshops
00:22:33
it was the beginning of a transition
00:22:34
that would end up changing Britain and
00:22:37
the world
00:22:40
to see how I'm heading to the Forest of
00:22:44
Dean in Gloucestershire
00:22:50
it didn't take long for all that easier
00:22:53
to get that call to be used up so the
00:22:55
miners were forced to talk into the
00:22:57
earth chasing the cold sings on the
00:23:00
ground and down there they had a problem
00:23:03
but it was a problem which that Tondo
00:23:06
would unleash the Industrial Revolution
00:23:18
in the process mining condemn millions
00:23:22
to dusty dirty existence as man and even
00:23:25
children were sent underground this mine
00:23:31
is the nearest I can get to experiencing
00:23:33
what alley coal mining was like it's
00:23:41
owned by Robin Morgan who spent all his
00:23:44
life mining is it falling day no I'm
00:23:51
just putting this one back up a cheater
00:23:52
said you wouldn't just put me here I
00:23:54
said have a go I swear he dropped it
00:23:56
down there
00:23:59
the first money ever went down I was
00:24:02
only 13 years of age
00:24:03
my two brothers had their own mind yeah
00:24:06
and they said drop me down a shaft 100
00:24:08
foot deep in a 40 gallon drum which
00:24:11
he'll hook since I'd out of hand which
00:24:13
so was it cold that's what I'm looking
00:24:16
forward to seeing but a college team is
00:24:17
actually on in there I can take you on
00:24:19
it yeah just like the early miners Robin
00:24:33
hacks out that call by hand
00:24:41
until they get get out of going you've
00:24:43
got global means young there's no much
00:24:45
room up here all right
00:25:02
supposed to be soft swing the peg inside
00:25:05
you're just chopping it you gotta pull
00:25:06
the paper over and swing it and you've
00:25:09
wrote into those two inch layers and
00:25:11
they will price off there how do you do
00:25:16
Robin wanna see you get you shoot all
00:25:18
the herbs like you know maybe you've
00:25:19
only been up there five minutes yeah I
00:25:21
know it's all right but spending 12
00:25:31
hours a day
00:25:32
smashing lumps out of them well that
00:25:35
call isn't as hard as rocks no house you
00:25:41
were performing at the moment I
00:25:42
definitely wouldn't give you a job
00:25:43
because the rate they're getting off you
00:25:45
would not survive
00:25:50
but in the 17th and 18th centuries the
00:25:54
problem for Britain's miners was more
00:25:56
fundamental than a lack of muscle power
00:25:59
[Music]
00:26:00
the trouble wars the deeper they
00:26:03
tunneled the more likely they were to
00:26:05
encounter a major obstacle water can
00:26:12
plenty of it 300 years ago - was
00:26:16
followed the coal seams on the ground
00:26:18
this was a problem they faced and so
00:26:22
when this problem was the key to
00:26:24
industrial transformation
00:26:32
once the miners got down to the water
00:26:35
table their tunnels flooded and the coal
00:26:38
became inaccessible it was impossible to
00:26:41
pump the water out by hand a
00:26:44
technological solution was desperately
00:26:47
needed and in the early 18th century
00:26:52
engineers came up with one the steam
00:26:58
engine
00:26:59
it was designed specifically to pump
00:27:02
water out of mains but it soon found
00:27:06
other uses within decades the combined
00:27:12
power of steam and coal became the force
00:27:15
behind an extraordinary integrated
00:27:17
economy
00:27:20
[Music]
00:27:21
coal fueled the blast furnaces which
00:27:24
smelted steel
00:27:28
the steel was turned into trains and
00:27:31
ships powered by steam engines of course
00:27:34
which in tongue bunt war coal
00:27:41
today we know this transformation in our
00:27:44
years of fire as the Industrial
00:27:47
Revolution
00:27:48
[Music]
00:27:56
you know been down here really focuses
00:27:59
your mind Britain was a tremendous
00:28:02
amount that distant geological age when
00:28:04
trees ruled the world think of the
00:28:08
Industrial Revolution as the rise of
00:28:11
Carboniferous capitalism but the planet
00:28:20
was fickle with its favors Britain was
00:28:25
given huge reserves of coal and the
00:28:28
geography too exploited not everywhere
00:28:32
was so lucky
00:28:40
there was another country blessed by the
00:28:42
planet with huge reserves of coal in the
00:28:46
17th century it too is poised on the
00:28:49
edge of an industrial revolution but its
00:28:53
story played out rather differently
00:28:58
that country was China by this time
00:29:05
China had been molded into a vast empire
00:29:08
it was rich and technologically advanced
00:29:12
[Music]
00:29:15
China seemed perfectly positioned to
00:29:17
exploit its coal reserves
00:29:22
[Music]
00:29:24
there was one problem China's coal
00:29:29
reserves may have been massive but they
00:29:31
were a long way from the country's
00:29:32
cities on the coast
00:29:35
however running straight from the coal
00:29:38
fields to the sea was the mighty Yellow
00:29:41
River
00:29:44
so in theory transporting the call to
00:29:47
the market should have been possible
00:29:53
[Music]
00:29:56
this is jakku a beautiful old town on
00:29:59
the Yellow River
00:30:01
it's right in the heart of coal country
00:30:05
[Music]
00:30:08
if coal was to be carried downstream to
00:30:11
the course it would have to pass through
00:30:13
here
00:30:15
[Music]
00:30:24
hello hi mr. Lee is 76 years old and
00:30:29
he's been navigating these waters since
00:30:32
he was 11 his son runs a local ferry
00:30:35
service
00:30:39
the water looks very calm very still the
00:30:42
water okay Jackie okay go thank you yes
00:30:45
cuz I get seasick okay get on okay the
00:30:52
Lee family are going to take me down the
00:30:54
river in a traditional flat bottom board
00:30:57
and the same used for generations this
00:31:04
is the route that called from China's
00:31:06
coal fields that have had to travel it's
00:31:11
like a nice relaxing day in the town but
00:31:21
just downstream from chiku is an
00:31:23
obstacle
00:31:31
mr. Lee and his friends who boast an
00:31:34
average age of 75 are the last people
00:31:38
who know how to raid these Rapids
00:31:47
these Rapids are all in here because the
00:31:50
tunnel that our yellow rubber gets
00:31:52
constricted to these Buddha's over here
00:31:54
let's hard rock here
00:31:56
it's literally caught between a rock and
00:31:58
a half
00:32:07
and it would be even harder to get
00:32:09
through if we were laid him down with
00:32:11
coal
00:32:22
oh we made it
00:32:26
it's a couple of hairy movements but
00:32:29
mangy it wasn't the washed set a wrapper
00:32:31
to the world but it does make you
00:32:32
realize it if you're taking a bulky
00:32:35
cargo like Cole down here
00:32:37
then either it forwards are gonna end up
00:32:39
in the drink the bottom of the river
00:32:43
this is only the start downstream there
00:32:47
are many more Rapids
00:32:53
and just to add to the difficulties the
00:32:56
only way to get the boat back upriver is
00:32:59
sheer manpower but these Rapids meant
00:33:05
was that you could transport goods
00:33:06
downstream as far as Chico over there it
00:33:09
was impossible to take it bother for
00:33:11
cargo boats these Rapids were the end of
00:33:15
the lane
00:33:18
so the only way to get the call to
00:33:21
market was to carry it over land to the
00:33:24
coast a thousand kilometres away but its
00:33:30
price doubled every 40 kilometers the
00:33:36
geography of the Yellow River ensured
00:33:38
that coal could never be shipped
00:33:40
directly to the Bing coastal markets and
00:33:44
that meant that the Empire was
00:33:46
effectively cut off from the vast
00:33:48
reserves that could have completely
00:33:50
transformed it the British invented the
00:33:57
steam engine to overcome the barrier
00:34:00
pause by flooded mines but the Chinese
00:34:05
failed to find a similar solution to
00:34:07
their geographical problems it was one
00:34:10
of those moments when human factors
00:34:13
interacted with the opportunities the
00:34:15
planet had to offer
00:34:19
while Breton was forging an industrial
00:34:22
revolution the Chinese were building
00:34:25
these enormous gardens at Chengdu they
00:34:31
were designed to celebrate the size and
00:34:33
diversity of the Empire
00:34:37
there was a miniature replica of the
00:34:40
Yellow River a smaller version of the
00:34:43
Great Wall and even a copy of the dalai
00:34:47
lama's palace in tibet
00:34:51
these Gardens symbolized China's
00:34:54
preoccupation with managing its vast
00:34:57
territory it was such a high priority
00:35:01
that rather than focusing on
00:35:03
technological innovation the brightest
00:35:07
minds were sucked into running the
00:35:09
Empire not until the middle of the 20th
00:35:18
century the chain abode extensive road
00:35:21
and rail systems into its heartland and
00:35:24
start its own industrial revolution
00:35:29
ironically China is no the biggest user
00:35:32
and producer of call in the world
00:35:45
China's rulers might not have found a
00:35:47
way to solve their fuel crisis 300 years
00:35:50
ago but its people had a goal they came
00:35:54
up with a brilliant invention which
00:35:57
today is known across the world
00:36:00
until a 16th century Chinese cuisine was
00:36:04
renowned for its delicious juice
00:36:06
we take Lord the Taemin Lords of wood to
00:36:08
cook so then the era of growing wood
00:36:11
shortage a radical new approach was
00:36:13
needed and this was at the war it's
00:36:18
funny to think that a crippling mood
00:36:19
farm and gave us one of the most famous
00:36:22
squeezings in the world the Chinese
00:36:24
stuff right
00:36:25
[Music]
00:36:36
the story of coal shows how the planet
00:36:39
played a crucial role in transforming
00:36:41
the fate of Nations at the time of the
00:36:44
Industrial Revolution
00:36:45
[Music]
00:36:49
it turned fire into the energy and
00:36:52
fueled human progress
00:36:55
and yet that was only the beginning
00:36:59
today the planet stores of ancient
00:37:02
carbon have an even greater impact on
00:37:04
our world
00:37:07
[Music]
00:37:09
that impact hinges on another type of
00:37:12
buried carbon to see how its formed have
00:37:20
come to an amazing cave on an island off
00:37:22
southern Iran
00:37:34
is it straight there or yes it's so
00:37:37
there's a little bit of a lip and then
00:37:38
it goes straight down and then it opens
00:37:40
out wide and open space the last drop 15
00:37:44
meters
00:37:46
I just looked oh my god
00:37:50
I have to absolute
00:37:55
enter the cave system ah inside is
00:37:59
evidence that reveals where this other
00:38:01
store of ancient carbon comes from and
00:38:03
how it's made that is just plain weird
00:38:25
I'm heading for some caverns that are
00:38:28
even deeper underground
00:38:46
oh this it's gotta be the toughest and
00:38:54
scariest game ever done there's a
00:38:57
hundred meters of solid rock above me
00:38:59
but it's good because I have is one of
00:39:04
the most unusual cave systems in the
00:39:06
world most caves are made from solid
00:39:13
rock
00:39:14
[Music]
00:39:15
this Calvin is different
00:39:21
[Music]
00:39:23
Wow cabeza
00:39:25
please a stalactite the weirdest ones
00:39:30
I've ever seen I mean normally solid
00:39:33
things I made a limestone and they drip
00:39:35
vertically down but these if you look at
00:39:39
them closely they're made of small
00:39:40
crystals of twisting tongue you can
00:39:45
check what they're made of really easily
00:39:47
though because you just did to lick them
00:39:49
oh yeah salt
00:40:00
[Music]
00:40:09
[Music]
00:40:15
written in the roof is a clue to where
00:40:19
the salt came from this magnificent
00:40:23
straight banding is a real giveaway clue
00:40:27
the layers are formed with seawater
00:40:29
evaporates away leaving behind
00:40:32
then.who residue of salt crystal this is
00:40:35
all evidence that the salt rock was
00:40:37
originally laid down in an ocean that
00:40:39
dried up
00:40:41
[Music]
00:40:55
to create so much salt you need to
00:40:58
evaporate an awful lot of sea water
00:41:01
usually this happens in shallow seas
00:41:05
which get cut off from the rest of an
00:41:07
ocean sea water then evaporates leaving
00:41:11
behind a thick layer of salt
00:41:16
but it's not ordinary salt that gets
00:41:18
left behind when an ocean evaporates
00:41:24
shallow seas are the most biologically
00:41:26
productive part of the ocean they're
00:41:29
teeming with life
00:41:31
all made from carbon
00:41:41
when marine creatures die their
00:41:44
skeletons build up on the seafloor over
00:41:48
millions of years these skeletons are
00:41:51
transformed into a sludge of carbon and
00:41:54
buried under sediment and layers of salt
00:41:59
one of the best places to see what that
00:42:02
sludge ends up looking like isn't the
00:42:07
Republic of Azerbaijan
00:42:12
[Music]
00:42:16
here they call it NAFTA on
00:42:22
[Music]
00:42:23
it's been used as a health treatment for
00:42:25
thousands of years healed is a cure for
00:42:28
everything from rheumatism to baldness
00:42:38
[Music]
00:42:50
it's said that four thousand years ago
00:42:53
the Babylonians mix this stuff with beer
00:42:56
and drank it as a medicine but there is
00:43:01
another way to enjoy its healing
00:43:02
properties
00:43:06
[Music]
00:43:19
[Music]
00:43:20
it's so clingy good
00:43:27
[Music]
00:43:39
you know people have been doing around
00:43:40
doing way back to the time of the
00:43:42
ancient Persians the Lord knows what may
00:43:45
they'll get their kid off and start to
00:43:47
bathe in this it was when I first saw it
00:43:52
looked absolutely disgusting they feel
00:43:56
about me woman he was horrible but now
00:44:00
after five minutes it still feels
00:44:03
absolutely disgusting
00:44:07
[Music]
00:44:09
just as well this isn't it's only use
00:44:16
you know I think I can smell someone
00:44:18
smoking it's just making me a bit
00:44:21
jittery because no because this is oil
00:44:25
I'm lying in a bath of petroleum
00:44:40
today we've thought of a few more ways
00:44:43
of using oil
00:44:44
it's the ultimate source of concentrated
00:44:46
carbon energy it's more energy rich than
00:44:51
coal easier to transport and it's got a
00:44:55
million different uses
00:45:05
the use of oil is the pinnacle of a
00:45:08
mastery of fire
00:45:14
fittingly the first country to benefit
00:45:17
from the exploitation of oil was the
00:45:19
home of naphthalene
00:45:22
Azerbaijan
00:45:27
you know for centuries this thick black
00:45:30
oily sludge was dug out the grown here
00:45:33
by hand on a small scale basis but the
00:45:36
middle of the 19th century demand for
00:45:38
oil really took off and what had been a
00:45:41
cottage industry London for that
00:45:51
[Music]
00:46:04
within 20 years these fields with the
00:46:07
site of the first great global oil boom
00:46:10
from across the world entrepreneurs
00:46:12
rushed to Azerbaijan to make the
00:46:14
fortunes some succeeded so well that the
00:46:18
names are always legendary the Shell Oil
00:46:21
Company started life here and the noble
00:46:24
brothers of Nobel Prize Fame built their
00:46:27
business empire on as Ariel this place
00:46:38
[Music]
00:46:41
by the early 1900's baku the capital of
00:46:46
Azerbaijan boasted more millionaires
00:46:49
than anywhere else on earth
00:46:53
[Music]
00:46:57
but Azerbaijan really awed its sudden
00:47:01
wealth to fluke of geology in the land
00:47:14
of Naphtali an oil happens to be
00:47:16
exceptionally close to the surface you
00:47:22
can see how close at an unusual location
00:47:25
in the south of the country if you want
00:47:33
to appreciate why this country was a
00:47:35
sailor the first great oil boom you
00:47:37
don't have to look any further than
00:47:39
these curious moans let's watch the
00:47:42
moans it's interesting it's what's
00:47:43
bubbling out of them mud but not just
00:47:46
ordinary mud look what happens when I do
00:47:48
this
00:48:05
the reason that's flammable is that the
00:48:08
mud is full of natural gas which is
00:48:11
formed along with the oil you know these
00:48:16
things are like like miniature volcanoes
00:48:19
really except that rather than hot water
00:48:23
not have a spew node at the top it's
00:48:26
just mud so the thing is you can dig
00:48:29
into them and you can see what they
00:48:32
cannot Plumbing's like inside it's
00:48:35
exactly what I'm doing now you can see
00:48:42
it in here like muds just bubbling up
00:48:45
and here in this cavity and then there's
00:48:48
a little vent pipe that carries it up to
00:48:50
the top but it spews out there were a
00:48:56
few places on earth
00:48:58
but it was easier to extract oil and gas
00:49:00
than Azerbaijan
00:49:05
but by the start of the 20th century
00:49:08
demand for oil was rocketing and new
00:49:11
sources had to be phoned
00:49:16
once again the Earth's distant past
00:49:19
would play a decisive role in meeting
00:49:22
our meet
00:49:27
the big question is why a few lucky
00:49:30
places ended up with huge oil fields but
00:49:32
others didn't I don't think it's an
00:49:35
exaggeration to say that the answer to
00:49:37
that puzzle has shaped the global
00:49:39
geopolitics of our age it's probably the
00:49:43
most powerful way that the earth has
00:49:44
influenced human history
00:49:51
after Azerbaijan faded from prominence
00:49:54
the Middle East's became the key
00:49:56
oil-producing region in the world
00:49:59
it always there's good fortune to a
00:50:02
chain of events that began almost 300
00:50:05
million years ago
00:50:08
[Music]
00:50:11
back then the two areas that would one
00:50:14
day for most of the modern Middle East
00:50:16
were separate but they were on the move
00:50:22
remarkably as they moved both areas
00:50:26
spent much of the time submerged by
00:50:28
shallow seas so layer upon layer of dead
00:50:35
sea creatures built up on the ocean
00:50:37
floor and when periodically the Seas
00:50:41
evaporated the layers of salt were also
00:50:45
deposited
00:50:51
as the modern Middle East came together
00:50:53
these layers were buried deep inside the
00:50:56
earth where the heat and pressure turned
00:50:59
the Dead Sea creatures into oil
00:51:06
[Music]
00:51:10
but the earth played one final role in
00:51:13
telling this area into the dominant
00:51:15
oil-producing region in the world and to
00:51:18
see what it is I've come to an unusual
00:51:23
mountain range in Iran the drifting
00:51:31
continents helped form the oil but in
00:51:33
most areas the oil was buried deep in
00:51:36
the earth
00:51:42
too deep to be exploited it needed to be
00:51:47
brought closer to the surface which is
00:51:50
where salt returns to the story you know
00:51:54
as a geologist I've been lucky enough to
00:51:55
go to a lot of places and see a lot of
00:51:57
rocks but nothing really prepares you
00:52:00
for what you find here because here I am
00:52:02
walking in this scorching desert Sun
00:52:05
looking down on a glacier
00:52:07
but that isn't made of ice that's made
00:52:11
of salt
00:52:14
[Music]
00:52:16
this whole mountainside is covered in
00:52:19
salt that's used upwards from deep
00:52:22
inside the earth the remains of a
00:52:27
long-lost ocean
00:52:32
[Music]
00:52:41
I know this is such a surreal landscape
00:52:46
what's hard to take is it virtually
00:52:48
everything under my feet is moving you
00:52:51
can see that lik look at this here like
00:52:53
it he's cracks that are opening up in
00:52:55
the salt as it opens up and then closes
00:52:58
again and then also here in there look
00:53:01
yes a bit well let's just carried down
00:53:05
the Glacia by the salt from somewhere up
00:53:08
there I mean this is exactly what I
00:53:10
taste us
00:53:16
salt is similar to ace because it's soft
00:53:19
and plastic which is why it flows on the
00:53:24
Earth's surface this means it can slide
00:53:26
across the land like a glacier
00:53:33
but even more spectacular is the rule
00:53:37
that played underground and the
00:53:39
formation of oil reserves as the
00:53:48
continents collided to form the Middle
00:53:50
East layers of salt and oil-rich rock
00:53:53
strata began to buckle upwards the salt
00:53:57
in it much easier for the rock to bend
00:53:59
until eventually
00:54:05
it cracked no the oil could flew upwards
00:54:08
until it was trapped in a fold in the
00:54:11
rock kept in place by an impermeable
00:54:14
layer above the salt help the rock slide
00:54:21
easily acting as I kind of lubricant
00:54:23
creating huge folds cold anticlines
00:54:26
which were perfect for trapping oil and
00:54:29
where there are oil traps there are
00:54:31
generally oil fields if you take a look
00:54:36
at a map of the world's buried salt
00:54:38
deposits and overlay the major oil
00:54:40
fields it's easy to see why geologists
00:54:43
searching for oil go looking for salt it
00:54:51
takes millions of years and some pretty
00:54:53
extraordinary geological events to
00:54:56
create an oil trap that we can exploit
00:54:58
so it's not surprising that only a few
00:55:01
countries have oil beneath them and when
00:55:04
they find it there's always no limit to
00:55:07
what they'll do to get it out of the
00:55:09
ground
00:55:12
nowwhere symbolizes this determination
00:55:15
more than this town in the former Soviet
00:55:19
Union first glance this looks like your
00:55:25
typical Eastern European town you've got
00:55:28
your standard-issue apartment blocks and
00:55:30
the architecture has got a real
00:55:31
industrial feel to
00:55:38
it was first started in 1940
00:55:43
it's got a football team
00:55:48
and even a mosque
00:55:53
this place is called oily rocks and over
00:55:57
two thousand people live and what them
00:55:59
if ever there was a monument to an
00:56:01
obsession for oil then that is that
00:56:03
because what you don't see from the
00:56:06
ground is that oily rocks was built in
00:56:09
the middle of the Caspian Sea
00:56:23
it's 50 kilometers from dry land over
00:56:28
the years more than 600 oil wells have
00:56:31
been drilled from these platforms
00:56:34
today oily rocks is still producing oil
00:56:38
but it's past its peak
00:56:42
and that about sums up a relationship
00:56:45
with oil more generally
00:56:52
today were bonding it far faster than
00:56:55
the planet can make it it would take the
00:56:58
earth 3 million years to make enough oil
00:57:01
for just one year of our consumption
00:57:11
we've reached a tunneling point in human
00:57:14
history every major advance in human
00:57:20
civilization has been made possible by
00:57:23
our ability to raid the earth forever
00:57:26
more energy rich forms of carbon
00:57:30
but our love affair with bonding
00:57:33
carbon-based fuel is coming to an end
00:57:35
[Music]
00:57:38
carbon itself has become the problem
00:57:42
bonding it produces greenhouse gases
00:57:45
which are changing our climate
00:57:49
and that means if human civilization is
00:57:52
to continue to advance we will have to
00:57:55
break the link between progress and the
00:57:58
bonding of carbon
00:58:01
[Music]
00:58:10
next time a very different planetary
00:58:13
force as we are changing the surface of
00:58:18
the planet more than all the forces of
00:58:20
nature put together but are we
00:58:24
threatening the Earth's ability to
00:58:26
support human civilization
00:58:29
[Music]
00:58:35
and how earth made us is back here on
00:58:39
BBC HD in two weeks time

Description:

An epic series about how the natural forces of the planet have shaped human civilisation and reveals for the first time on television how geology, geography and climate have impacted on mankind. Episode Links: 1 - https://www.youtube.com/watch?v=emEq6x5_dpc 2 - https://www.youtube.com/watch?v=bsD9rvSPiWQ 3 - https://www.youtube.com/watch?v=5GorIgzw0Q8 4 - https://www.youtube.com/watch?v=34H7SMcYxI8 5 - https://www.youtube.com/watch?v=JlCkOtNXH6I Please consider subscribing to Iain's channel - https://www.youtube.com/user/piss1964 https://www.bbc.co.uk/programmes/b00qbvyc Production Companies British Broadcasting Corporation (BBC) (as BBC Productions) National Geographic Channel Zweites Deutsches Fernsehen (ZDF) (in association with) how earth made us full episode deep earth documentary geology geology documentary continents plate tectonics iain stewart bronze age iron age crust magma volcano bbc bbc documentary good documentary crete minoan knossos copper bronze tin smelting plate boundary wind earth fire water human planet civilisation evolution evolution of civilisation wind currents ocean currents

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