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Water found on the moon and Earth came from small meteorites called carbonaceous chondrites in the first 100 million years or so after the solar system formed, according to researchers who found evidence in samples of moon dust returned by lunar crews of Apollo 15 and 17.
Earth's core is a fascinating place. It's extremely hot, at times misunderstood, and creates the magnetic field that shields life from dangerous solar radiation.
Disputing conventional theories, a new model shows that the key mineral periclase deforms less easily than bridgmanite in the earth’s lower mantle.