<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
What exactly is at the core of the earth?
<|assistant|>
The core of the Earth is composed of two distinct regions: the inner core and the outer core. The inner core is a solid iron-nickel alloy, composed mostly of iron, that has a diameter of about 3455 km and a mass of 1783 km^3. The outer core is a liquid layer of hot solid iron, nickel and other light elements that has a radius of about 3483 km and a mass of 298 km^3.