The core is found about 2,900 kilometers (1,802 miles) below Earth’s surface, and has a radius of about 3,485 kilometers (2,165 miles). It consists of a solid center surrounded by an outer layer of liquid. Earth: Making of a Planet is a 96-minute documentary by National Geographic Channel, telling the story of planet Earth from its birth 4.5 billion years ago, through ice-ages and the dinosaur’s reign to the first humans. Earth: Making of a Planet chronicles the Earth’s 4.5 billion year story as it is literally pieced together from specks of dust through turbulent hundreds of millions of years of seething temperatures and brutal ice ages to the world’s greatest mass extinction – just before the first dinosaurs walked the planet – … Watch full episodes, specials and documentaries with National Geographic TV channel online. It has an inner core, an outer core, a mantle and a crust. ... National Geographic explores the people, places and events of our world.

Earth’s core is mostly made of iron and nickel. Earth is made up of different layers.