Why humans don't dig holes to reach the center of earth, and try to create cities under the ground too ?

Question

Would you mind answering also this other question of mine, please ? Thanks

http://answers.yahoo.com/question/index;_ylt=AlsfFEQtzfhHgHZxj.mX.83sy6IX;_ylv=3?qid=20080819042419AALkhbZ

Answer 1

im happy to live above the ground, AS LONG AS there will be no WW3 LOL

Answer 2

It isn't practical to build underground cities. The center of the earth is still molten and it will remain so for many millions of years. The crust is only a few miles thick under the oceans and no more than 30 miles thick from the continents.

Cities require power sources and underground ones will also require ventilation. Any massive fire underground could deplete all the oxygen if ventilation is inadequate. There's also the danger of poisonous gases such as methane and carbon dioxide, which could wipe out the city's inhabitants by taking the place of the oxygen in the air. Inhabitants could be buried alive during an earthquake, and if the underground city is near to a large surface body of water, such as a dam or ocean, there's always the risk of being submerged by large volumes of water from above.

basically you'd need a compelling reason to venture underground in this manner...a nuclear winter on the surface, or radioactivity on the surface of the planet could be reasons.  

Answer 3

The earth isn't solid all the way through, we live on a thin crust floating on a ball of molten rock and iron, so there is only so far we can dig!

Would you want to live underground??

Answer 4

Digging is hard.  And what we know as Earth and Rock (the crust) only exist in the top 100 Km  of the  6000km between the surface and the center.  Below the Crust is 3000km group of layers of semi-molten rock.  Then a 2000km liquid iron outer core and 1000km solid inner core.    So below the crust there is really no 'place' within the Earth to dig to.

But, if we could dig tunnels all the way through the earth we could reach the other side of the earth in 42 minutes using only gravity.  (With friction from air and a guide rail, it would take actually little longer and require a little extra energy)

Answer 5

There are # things that stop people from doing anything cool

1 Cost

2 Hazards

3 Why should we

If all of those are dealt with we very well may have a undergound city

Russia already did it