Despite being our planet's closest neighbour, scientists have been grappling with the mystery of our moon's origin for hundreds of years. Since the 1980s, experts have assumed that our lunar satellite ...

The moon did indeed coalesce out of tiny bits of pulverized planet blasted into space by a catastrophic collision 4.5 billion years ago, two new studies suggest. The new research potentially plugs a ...

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Among the inner solar system, Earth is the only planet that experiences plate tectonics. A new study, using convection models, shows that Earth’s collision with the protoplanet Theia some 4.5 billion ...