What is the earth's core made of?

The Earth's inner core is the Earth's innermost part. It is primarily a solid ball with a radius of about 1,220 kilometres (760 miles), which is about 70% of the Moon's radius. It is composed of an iron–nickel alloy and some other elements. read more

Earth's core is the deepest, hottest layer, and it's made up of two layers itself: the outer core which borders the mantle and the inner core, which is a ball-shaped layer made almost entirely of metal. read more

Earth's inner core is made mostly of iron and nickel, but 5 percent of it has been a mystery for a long time. This new study concludes that it's most likel Just recently, scientists discovered a continent-sized liquid metal “dragon” making its way around the Earth’s outer core. read more