Imagine the world waking up one morning to discover that all compasses pointed south instead of north. It’s not as bizarre as it sounds. Earth’s magnetic field has flipped – though not overnight – many times throughout the planet’s history. Its dipole magnetic field, like that of a bar magnet, remains about the same intensity for thousands to millions of years, but for incompletely known reasons it occasionally weakens and, presumably over a few thousand years, reverses direction.
Read more about Earth’s Magnetic Field Could Flip Within A Human Lifetime
Read more about Earth’s Magnetic Field Could Flip Within A Human Lifetime
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