that demonstrate your ideas

you've also been developing your ideas continuously.

- Oh, yes. - What has that been about?

What are some of the ideas that you've changed or added?

In the early days, I pictured the buildings going up

with some assistance of machines.

Later, I devised particular types of machines

that can erect particular kinds of buildings very quickly.

During the early stages they will have the appearance

of mechanisms like you see here.

Each one of these robots are designed to cover

a certain amount of functions.

Starting with this type of robot which will be typical

which will handle materials with many different configurations

and move them, position them, and lock them in place.

During the early stages you're going to have different machines.

At the later stages of nanotechnology

the machines will be able to undergo morphing, or changing their shape

to accommodate whatever project lies before them.

This represents a relatively complex aluminum extrusion.

Those of you that are not familiar with that

if you were to take a toothpaste tube

and cut the letter 'T' in the opening

and squeeze the toothpaste, it would come like a letter 'T'.

This is how extrusions are made.

However, in the future, it may be possible

to extrude complete apartment houses

apartment building units or modules.

The machine would extrude the apartments

then they'd be cut automatically to length.

This lift unit

places the apartment or module

onto this crane, which then lifts it up

and advances it forward

so it locks into the twin towers.

It is coupled together automatically,

requiring no human labor.

This extruder can be faced

with different dyes to mold different shapes

Almost an infinite variety of shapes can be extruded.

It would be the apartment of your preference that's extruded.

This is a similar machine, operated by tractors

and advances toward the building

and then projects the segment of a building

directly into that hole and it's locked into place.

Any shape, or almost any extruded shape

can be designed to fit many different architectural arrangements.

The interiors of the buildings will not be fabricated

unless specified before the building is constructed.

After the building is constructed, the appointments in the building

are selected by the architect: the kind of furniture

the color arrangements, etc.

All television sets, all radios, all communication devices

slip into zones in the ceiling or wall

and you pull them out and put the latest stuff in. They don't change

every year, except the quality of the imagery.

Units that are designed today don't fit in with the house

you have to kind of stick them somewhere.

The future will look like it was born that way

a lot like the human body. You don't have an eye hanging out there

on a strap which you pull back, and that's what furniture looks like.

The interior of a house to me looks like a lot of stuff piled up.

It doesn't look like it was born that way.

It doesn't fare together like most natural things do.

This is a transitional-type structure

which utilizes cranes to lift the components of the building.

Eventually, the building itself

will be part of a self-erecting structure.

If there are particular areas where people don't want to live in

we could build underground cities

in the polar regions, tremendous cities

a quarter of a mile in diameter.

The height of the dome is high enough so it's near the surface

with a tremendous circle

which daylight comes in through.

The outer perimeter will serve as the apartments.

The inner section will have lakes, tennis courts, fields and parks.

As you see these surrounding elements here

there are elevator shafts in them, and in those elevators are transveyors

that take you anywhere in the city, and take you to the outer surface

where you can go skiing, hiking, and do whatever you want. There are winter sports.

There's also transportation above and underground to the next city.

Under certain conditions, we can project

the movement of clouds onto the ceiling

so it doesn't feel like you're living in a subterranean city.

People picture an underground city, subterranean

as damp, like a subway terminal, damp and smelly.

But the underground cities I'm talking about are beautiful.

You wouldn't know you were in an underground city.

The only difference is it would be located in areas

that ordinarily would not support human habitation.