'In 1952 Francis Birch showed that the center of the Earth is basically this metal in molten form'
iron
THE REAL MIDDLE EARTH: In 1952 Francis Birch showed that the center of the Earth is basically this metal in molten form
In 1952 Francis Birch showed that the center of the Earth is basically this metal in molten form
In 1952 Francis Birch showed that the center of the Earth is basically this metal in molten form
THE REAL MIDDLE EARTH
iron
THE REAL MIDDLE EARTH