What are some facts about the inner core?

Quick Answer. The inner core is the Earth’s deepest layer, and it is a solid iron ball that is approximately 1,500 miles in diameter. Although it is extremely hot, the iron cannot melt due to the high pressure. The inner core also consists of nickel and sulfur and smaller amounts of elements other than iron. read more

The planet Earth consists of a series of distinct layers, each of which has a unique structure. The inner core of the Earth has a number of surprising properties. read more

Some scientists believe that the earth's inner core actually has another inner-inner core. They believe it formed approximately 500 million years ago due to a geological change. In addition to seismic activity, scientists use a variety of other information to learn about the earth's inner core. read more