David Attenborough's Conquest of the Skies 3D

Synopsis: Evolutionary story of flight from the very first insects to the incredible array of creatures which rule the skies today.
Genre: Documentary
 
IMDB:
8.3
Year:
2015
109 Views


We human beings are

very latecomers to the skies,

and although we might think

that we're now pretty good at it,

the natural world, with the help of

several million years of evolution,

has produced a dazzling range

of aeronauts whose talents

are far beyond ours.

The story of how animals managed

to colonise the air is truly astonishing.

First into the skies were insects.

They initially had two pairs of wings

which in due course,

were modified in many different ways.

But after having had the skies to

themselves for about 100 million years,

a new group of animals took to the air:

Vertebrates, creatures with backbones.

They faced a different challenge,

for their bodies

were much bigger and heavier.

But eventually they evolved

several ways of solving that problem.

We will travel the globe

to trace the details

of the extraordinary skills,

of the backbone flyers.

This is Borneo.

And here there are still

great tracts of pristine rainforest,

forest that is wonderfully rich

in animals of all kinds.

I am being winched-up

into one of the tallest trees here,

in search of a creature

that can give us a hint,

of how backboned animals

first took to the air.

Hidden among these leaves, of this fern,

high up here, in the canopy,

is a very remarkable, little frog.

It's a Harlequin Tree Frog,

and it's a very, very good climber.

It spends most of its life up here,

clambering around in the branches.

Here it's away from

the numerous predators there are

that might attack it

down on the forest floor.

But if in fact, a predator

were able to get up here, to hunt it,

a snake perhaps, well the Tree Frog

has a remarkable trick for defence:

It glides.

It has membranes between

greatly elongated toes,

so that each foot becomes a parachute

which slows the frog's descent,

and so enables it to make

a relatively safe landing.

The vertebrates made their first foreys

into the air around 260 million years ago,

and it's very likely that some

of these pioneers used skinny membranes

to control their falls, in much the

same way as this little frog does.

It has to be said, that it's not

a very good aerial navigator,

it seems as though it just jumps

and hopes for the best.

But there are animals up here,

that glide around from tree to tree,

which are very good navigators indeed,

so good in fact, that they can go

from one tree to another,

and never go down to the ground

in their entire lives.

One of them is

a little lizard called Draco.

Each male has his own little territory

in the branches,

and tries to attract females

and warn off rivals,

by flashing his dewlap.

He also spread coloured flaps

of skin from his flanks,

that when fully extended,

do more or less the same thing.

But there are predators

among the branches.

Snakes also live up here,

and they hunt lizards.

But Draco's side flaps

now serve another purpose.

He uses them to glide, by hidging forward

his specially elongated ribs.

And he is so skilled in the air,

that he can steer and land

on the trunk of his choice.

So, if you live up in the branches,

it's less laborious,

and indeed safer, to travel by air,

than to come down to the ground.

But if you want to be a true flyer,

you have to be able to fly

not only downwards but upwards,

you have to have powered flight.

This is another reptile,

and one with even

greater flying abilities

than that little gliding lizard.

Today, sadly, it's extinct.

This is Dimorphodon.

We can deduce from its fossils

that it had the muscles

needed to beat its wings,

and computer imagery can show

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David Attenborough

Sir David Frederick Attenborough (; born 8 May 1926) is an English broadcaster and naturalist. He is best known for writing and presenting, in conjunction with the BBC Natural History Unit, the nine natural history documentary series that form the Life collection, which form a comprehensive survey of animal and plant life on Earth. He is a former senior manager at the BBC, having served as controller of BBC Two and director of programming for BBC Television in the 1960s and 1970s. He is the only person to have won BAFTAs for programmes in each of black and white, colour, HD, 3D and 4K.Attenborough is widely considered a national treasure in Britain, although he himself does not like the term. In 2002 he was named among the 100 Greatest Britons following a UK-wide poll for the BBC. He is the younger brother of the director, producer and actor Richard Attenborough, and older brother of the motor executive John Attenborough. more…

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Submitted on August 05, 2018

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