II: The Broken Dynamo and the Radiological Ceiling

This paper proposes that the rapid extinction of Pleistocene Megafauna and the subsequent reduction in human lifespan were not caused solely by climate change or overhunting, but by a catastrophic failure of the Earth’s geomagnetic shield. We argue that a massive Plasma Bolide event ~12,900 years ago impacted the South Atlantic, creating a persistent "Reverse Flux" eddy (the South Atlantic Anomaly) that permanently destabilized the Geodynamo. This event ended a "Hyper-Shielded" epoch, plunging the biosphere into a high-radiation environment that continues to degrade biological viability and DNA integrity today.