Tag Archives: Geomagnetic

A Hitchhiker’s Guide to an Ancient Geomagnetic Disruption

A Hitchhiker’s Guide to an Ancient Geomagnetic Disruption

A Hitchhiker’s Guide to an Ancient Geomagnetic Disruption A Hitchhiker’s Guide to an Ancient Geomagnetic Disruption About 42,000 years ago, Earth was beset with oddness. Its magnetic field collapsed. Ice sheets surged across North America, Australasia and the Andes. Wind belts shifted across the Pacific and Southern Oceans. Prolonged drought hit Australia; that continent’s biggest mammals went extinct. Humans took …

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