All language subtitles for Walking with Dinosaurs s01e06 Death of a Dynasty.eng

This little mammal is a scavenger

Called Didelphodon,
she is a marsupial

and specialises in raiding
abandoned dinosaur nests

This evening, she could be in luck

Unfortunately, the smell of the nest
blinds her senses to danger

(Squeaking)

(Huge roar)

(Bellows)

The end of the Cretaceous

The continents
are taking their modern forms

But this movement
of the Earth's crust

has produced a surge
in volcanic activity

Massive eruptions
that have lasted for centuries

have laid waste to landscapes,

filling the atmosphere
with gases and debris

This desolate world
is still ruled by dinosaurs,

as it has been
for 160 million years,

but they are nearing the end
of their reign

Life on earth is choking to death

Yet in the last two million years,

the dinosaurs'
most infamous predator has appeared

Tyrannosaurus, a five-tonne,
13-metre long carnivore,

specifically evolved
to kill other giant dinosaurs

This is a male

He's been drawn to this volcano
by the smell of food

The area is full
of geothermal springs

and the air thick
with sulphurous fumes

But there is another smell here

In one smallvalley,
there is the stench of death

Unwittingly, the Tyrannosaurus
has been drawn into a natural trap

Volcanic vents are producing
poisonous carbon monoxide,

and because it is heavier than air,

it has formed a suffocating layer
close to the ground

The giant predator
stands above the layer,

but as he puts
his head down to feed

he begins to feel the effects

If he topples over now,
he will never get up

Eventually,
his sheer size is his salvation

As he stands up with his prize,
his head just clears the gas layer

There are still islands of greenery
between the lava flows

In the warm, moist climate
of the late Cretaceous,

the vegetation has transformed

Instead of conifers,

broad-leaved trees
fill the forest canopy

Driving this quiet revolution
among the plants

is the remarkable
evolution of flowers

Their secret lies in their
intimate relationship with insects,

so close that some flowers
can only be pollinated by insects

and some insects, like butterflies,
can only feed on flowers

Among these new plants,
the birds are flourishing,

and their calls form
an ever-present chorus

Millions of years of evolution

have also created
intimate relationships

among different types of dinosaurs

Especially the delicate balance
between predator and prey

(Terrifying squawk)

(Hissing roar)

One dinosaur
that specialises in defence

is the extraordinary Ankylosaurus

They are evolved to withstand attack
even from giant predators

like Tyrannosaurus

At seven tonnes, Ankylosaurus
are so heavily armoured

that even their eyelids
are hardened

And if that wasn't enough,
they have a formidable club

on the end of their tails

Sadly, not even these magnificent
creatures have any defence

against the natural forces
that are suffocating their world

Nearby lies the Tyrannosaurus nest

These are usually
closely guarded by the mother,

but this nest has been abandoned,

and a Didelphodon
has burrowed into the side

Dinosaurs are vulnerable because
they lay their eggs on the ground

But size helps,

and the egg is a challenge
for this marsupial

Soon the age of the mammals
will dawn,

and they will grow massive,

but this is as big
as Cretaceous mammals get

The Tyrannosaurus embryo inside
the abandoned egg is already dead

The scent is a lure
to another Didelphodon

(Snarls and growls)

(Growling)

(Loud shrieks)

Many dinosaur embryos cannot
survive in this volcanic environment

because acidic pollution

prevents their eggshells
from forming properly

(Bellowing)

The mother is calling
for a new mate

Tyrannosaurus have huge territories
of hundreds of square kilometres

Her challenge is to attract
a wandering male

She may have to call
like this for weeks

One of the Tyrannosaurus's
principal sources of prey

are these bulky Torosaurus

In the late Cretaceous, herds of
horned herbivores are very common

and attract many predators

It is rutting season To display,
males flush blood into their crests,

creating vivid patterns

These displays help
to avoid physical contact

With one-metre-long horns,

fighting can easily result
in bad injuries

The best and the brightest crest

is all that is needed
to settle arguments

Occasionally,
showing off is not enough

and males resort to brute force

For this old Torosaurus,
this was one fight too many

He will never again
challenge for the right to mate

(Gruff mooing)

The mating call
of the Tyrannosaurus

continues to echo
across the volcanic slopes

And it has been heard

A male has killed
a young Triceratops

It's not just to satisfy his hunger
It is a gift

Female Tyrannosaurus
are larger and more aggressive,

and he courts her with food

to stop her attacking him on sight

(Hisses)

(Growls)

(Growls)

The female arrives

(Short roars)

She is wary

The primary weapon
of a Tyrannosaurus is its mouth

Its arms are tiny
so it can carry a massive jaw

and remain balanced

This jaw can crush bone
and tear off up to 70 kg of meat

with one bite

The male keeps his distance

Later that evening, they mate

This is the first of many couplings

as the male stays by the female
while she is receptive -

ready to see off any other males

On the lava flows,
a group of Anatotitan

wanders between islands of greenery

These animals are members
of the hadrosaur family,

the most common group of dinosaurs
in the Late Cretaceous

But their kind has evolved

to thrive in lush lowland swamps,
not in an ash wilderness

Three days have passed

The Triceratops carcass
has been stripped

and the female Tyrannosaurus
is beginning to tire of her mate

(Roars)

(Hisses)

The male knows better than to stay

Gliding in from the coast,

a magnificent pterosaur,
Quetzalcoatlus, is hunting for food

This is now a rare sight

For 20 million years, these flying
reptiles have been in decline

These 13-metre giants
are the only ones left

And this is a dangerous place to be

One-tonne crocodiles
live in the lake,

and could easily drag
the delicate glider to his death

Driven on to extinction

The skies of the future
belong to the birds

that already flourish around him

Months have passed,
and the female Tyrannosaurus

has built a new nest,
camouflaged in the forest

Mother keeps watch

For the full two months
of the eggs' incubation,

she will not leave or even eat

She knows her nest
is a magnet to scavengers

Like this Dromaeosaur

His cautious approach
is watched by the Tyrannosaurus

She judges exactly
when he has got too close

(Roars)

(Squeals)

As the sun sets, another threat
comes out to haunt the mother

(Chirps and yowls)

(Growls)

(Bellowing roar)

With food becoming scarce,
the mammals are getting bolder

She checks to make sure
more have not burrowed in,

then returns to her vigil

The weeks pass, and above
the brilliant volcanic sunsets,

there are signs of an even more
destructive natural disaster

Showers of shooting stars
herald the approach of a giant comet

on a collision course
with the Earth

Far below,
the dinosaurs are oblivious

The Torosaurus herd
continues to feed

Nervous of moonlight predators,

younger animals seek protection
among the larger adults

(Restless mooing)

Using the darkness, a pair
of Dromaeosaurs unsettle the herd

and isolate one of the youngsters

(Hoarse shrieks)

(Lowing noises)

(Shrieking)

Safe But the predators have tasted
blood and will not give up easily

Morning reveals
the results of last night's tussle

The little Torosaurus lost his fight
with the predators

For the herd, it is a blow
Too few young are being born

in this polluted environment

A Didelphodon
is already at the carcass

These little opportunists are about
the only animals that are thriving

During their reign, dinosaurs
have adapted to huge changes

but now they face
a combination of events

that will spell their doom

After trekking
across the ash fields,

Anatotitans gather round
a stagnant pool to drink and feed

Huge batteries of chewing teeth

make short work of the vegetation

Once again, the predators make
the water's edge a dangerous place

The group senses danger
and starts to break up

The mother Tyrannosaurus
has broken her fast

and is back with a vengeance

Nearby is the reason for her hunger
Three Tyrannosaurus chicks

The only survivors
from a clutch of twelve

The moment they hear the kill,

they start calling for food

(Mewling and yelping)

The mother delivers
a slab of Anatotitan meat

Only four weeks old
and less than a metre high,

competition is intense between them

One is already picked on
by the others

(Faint mews)

They'll remain under their mother's
protection for another two months

Soon after that,
she will abandon them,

or worse, view them as food

It is unlikely
the outcast will last that long

A few days later
and the mother rests

in the warm afternoon sun

There is no sign
of the smaller runt

He may have been killed
by his siblings

Increasingly, the bickering pair are
happy to wander from their mother

to explore their surroundings

(Squawks)

From the undergrowth,
a snake watches

These reptiles
have only recently evolved

from the same family as lizards,

but they specialise in hunting
warm-blooded creatures like mammals

They use sensory pits
on their snouts

as a way of detecting the heat
signatures of other animals

It doesn't like what it sees

(Hissing)

While the chicks play, they are
oblivious to approaching danger

(Hoarse grunting)

The mother is caught
completely by surprise

The Ankylosaurus has very little
brain inside its reinforced skull,

so when faced with danger, it reacts
automatically and aggressively

Normally,
Tyrannosaurus would retreat,

but she will not abandon her young

(Low grunting)

(Roar)

The blow has cracked
the mother's femur

and ruptured internal organs

She limps away in agony

(Chicks squawk)

That night, the usual evening chorus

is joined by the whimper
of a dying giant

By morning, she lies lifeless
on the baking ash fields

The chicks stand expectantly by
the colossal corpse of their mother

Hours pass, and still they wait

But their fate will now be settled,

along with all the other
giant dinosaurs of the Cretaceous

3,000 km to the south, the massive
comet crashes into Earth

(Dinosaurs squawking)

The light from the impact
fades in silence

Then the shock waves arrive

(Rumbling)

Next comes the blast front

(Winds howl)

(Tearing and crashing)

Finally a rain of molten rock starts
to fall out of the darkening sky -

this is the end
of the age of the dinosaurs

The comet struck the Gulf of Mexico

with the force of 10 billion
Hiroshima bombs

In the catastrophic climate changes
that followed,

65% of life died out

It took millions of years
for Earth to recover,

and when it did,
the giant dinosaurs were gone,

never to return

In their place have emerged other
powerful and beautiful creatures

We now know one small group
of dinosaurs

did survive the extinction -

and they are all around us today -

the birds

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