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MIT's research on an ancient lunar rock suggests that the moon once harbored a long-lived dynamo — a molten, convecting core of liquid metal that generated a strong magnetic field 3.7 billion years ago. The findings, published today in Science, point to a dynamo that lasted much longer than scientists previously thought, and suggest that an alternative energy source may have powered the dynamo.
Originally posted by scottbob
Maybe the moon was another planet that crashed into earth, mixing life and cores, making earth as unique as it is today.