The newborn Earth was struck by a Marssized rock that helped create the Moon, and the impact may have left behind continentsized remnants of the rock near Earth’s core. Scientists think Earth formed about 4.5 billion years ago, and previous research suggested the Moon arose a short time later. The leading explanation for the
The remnants of an alien ‘protoplanet’ could be hidden deep within Earth
Nov 30, 2023
2 minutes
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