Oldest Measurement of Earth's Magnetic Field Reveals Battle between Sun and Earth for Our Atmosphere
8 Mar 2010, 23:08 UTC
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Scientists have discovered that the Earth's magnetic field 3.5 billion years ago was only half as strong as it is today, and that this weakness, coupled with a strong wind of energetic particles from the young sun, likely stripped water from the early Earth's atmosphere. (University of Rochester press release)
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