[rfp1234]

The discovery is helping to explain how our planet developed to sustain life, and offers new insights into how researchers can identify other planets that may host aliens, Vice argued.

Whenever I need credible research on the inner core, forget Earth and Planetary Letters, Tectonics, or Journal of Geophysical Research.

I just go to "Vice". [/S]

[Red Badger]

My guess is the molten metal core is full of iron, uranium, lead, gold, copper, silver and all the other heavy metals in one huge mass like the layers of an onion.

They all sank into the center when the Earth was being formed, and every now and then some of them leak out from volcanoes.................