Discovery reports scientists are proposing in a new theory about  formation of our moon: they think a massive nuclear explosion occurred at the edge of Earth’s core, flinging red-hot, liquid rock into space. The orbiting detritus gradually congealed into what is now our planet’s lone satellite.

Researchers think that as the molten Earth spun, radioactive thorium and uranium accumulated at the boundary between the core and mantle in large enough quantities to spark a runaway fission reaction. Heat and energy built up until  a nuclear jet pushed giant globs of molten rock into space…

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