<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
What exactly is at the core of the earth?
<|assistant|>
At the core of the Earth is a hot, dense region known as the inner core which is made of iron and nickel. It is around 7 million kilometers in radius and consists of around 75% iron by mass. Surrounding the inner core is the outer core, which is a liquid zone composed primarily of oxygen, silicon, and iron. The outer core has a total radius of about 23 million kilometers and accounts for about 30% of the Earth's mass.