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 ...

Save guides, add subjects and pick up where you left off with your BBC account. The Earth has a layered structure made up of the core, the mantle and the crust. Different elements are present in ...

"We found evidence that may indicate a change in the structure of iron, which suggests perhaps two separate cooling events in ...

However, a new discovery suggests that the Earth’s core is surrounded by an unexpected ancient structure. A high-resolution map of the underlying geology beneath Earth’s Southern Hemisphere ...

The Earth is made up of four major layers ... Professor Tkalčić and his co-author Dr Xiaolong Ma were able to detect this structure by studying the faint traces left behind by waves many ...