EARTH’S scorching core of molten metal has been leaking into the planet’s mantle for at least 2.5 billion years and scientists cannot quite explain why this is happening. The Earth’s core at the dead ...
So, it's believed that the Earth's core is mainly iron and nickel. These aren't, however, the heaviest elements in the Earth's chemistry. There are plenty of heavier elements like lead, thorium, ...
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