Journey to the Centre of the Earth - The Remarkable Voyage of Scientific Discovery into the Heart of Our World

The journey to the centre of the earth is a voyage like no other we can imagine. Over 3, 000 km below the earth's surface an extraordinary inner world the size of Mars awaits us. Dive through the molten iron of the outer core and eventually you will reach a solid sphere - an iron-clad world held within a metal sea and unattached to anything above. At the earth's core is the history of our planet written in temperature and pressure, crystals and minerals .