Although this inner core is white hot, the pressure is so high the iron cannot melt. The iron isn't pure—scientists believe it contains sulfur and nickel, plus smaller amounts of other elements.

If you buy through a BGR link, we may earn an affiliate commission, helping support our expert product labs. A new study published in Nature Geoscience claims that the Earth’s inner core may ...

This appears to be the case, to a rather stunning extent, in the instance of the reporting this week around new findings that researchers say shows the rotation of Earth’s inner core is slowing ...