[GonzoGOP]

I'm not at all sure that the metals there are all liquid.

Radioactive decay. When the Earth formed the heavier elements naturally settled to the bottom. So you end up with the low density rock on the top, then the iron and nickle that make up most of the planet. Finally at the very center you get material rich in uranium. And it is still breaking down and giving off a lot of heat.

Caused Pascal a lot of problems. He couldn't figure out why the center of the Earth hadn't cooled down yet. Of course back then they didn't know about radiation or nuclear fission.

[ml/nj]

When the Earth formed the heavier elements naturally settled to the bottom.

Oh. You know how the earth formed!

Can you tell me what the earth was like when it was only 4000 miles in diameter?

And after you do that maybe you can tell me where these heavier elements came from anyway. I thought the story was that earth formed from swirling clouds of hydrogen which somehow decided to ignore the old PV=nRT thing.

ML/NJ