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The Earth's mantle — the layer between the crust and the outer core — is home to a primordial soup even older than the Moon
Older than the moon
The Earth's mantle -- the layer between the crust and the outer core -- is home to a primordial soup even older than the moon. Among the main ingredients is helium-3 (He-3), a vestige of the Big Bang and nuclear fusion reactions in stars. And the mantle is its only terrestrial source.
heritagedaily.com



