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A magnetic field reversal 42,000 years ago may have contributed to mass extinctions | Science News | SANTA MONICA BAY AUDUBON SOCIETY BLOG
Reversal of the Earth's Magnetic Field: What Does It Mean For Life on Earth — Canada (Ontario) Beneath Our Feet
Reversal of the Earth's Magnetic Field: What Does It Mean For Life on Earth — Canada (Ontario) Beneath Our Feet
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