perfectly round crystal "puff balls." This is one of the most spectacular underground discoveries we've ever made—watch now to see what we uncover next! Zelenskyy, Trump set to sign rare earth ...

The Earth's interior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun. The deepest layer is a solid iron ball ...

Inside the belly of planet Earth, a giant solid ball of metal is surrounded by a ... it incorporates water in another ...