Scientists discover first direct evidence that slivers of 'proto-Earth' may survive today
SMRTR summary
Scientists found the first direct evidence that fragments of proto-Earth, the molten planet that existed 4.5 billion years ago, survive in ancient rocks from Greenland, Canada and Hawaii. These rocks contain unique potassium signatures that should have been erased when a Mars-sized planet called Theia collided with proto-Earth to form the moon.
SMRTR provides this summary for quick context. The original article belongs to Live Science.
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