[joering2]

here is a thought: center of the earth is 6,000c hot. There is a heat resistant aluminium to withhold this temp. Further, I am sure there are solutions to generate electricity from the heat. I wonder how hard would it be to dig a hole through the center of the Earth and put the cable in it, hahah :)

[sp332]

So far as I know, no one has ever breached the dense, hard layer at the bottom of the earth's "crust", just above the mantle. https://en.wikipedia.org/wiki/Mohorovi%C4%8Di%C4%87_disconti...

[pavel_lishin]

If you're trying to generate electricity by exploiting a difference in two temperatures, it would probably be more cost effective to just drop a cable into the ocean.

[joering2]

Wouldn't it be easier to generate electricity from extreme heat, rather than from cold water?

[pavel_lishin]

What actually matters is the temperature difference between two points.

But to answer your question, sure, probably - assuming your materials can withstand the extreme heat, and assuming you can get at it, which as sp332 pointed out here (http://news.ycombinator.com/item?id=3708465), we can't.