The invisible shield that protects all life on Earth is changing. The magnetic north pole has abandoned Canada and is racing toward Siberia at speeds never recorded in human history. A vast weak spot called the South Atlantic Anomaly is growing over the Atlantic Ocean, expanding by an area nearly half the size of Europe in just eleven years. Satellites malfunction when they pass through it. Astronauts report strange flashes of light in their eyes.

Forty two thousand years ago, during an event scientists call the Laschamps Excursion, the magnetic field collapsed to just five percent of its current strength. The poles wandered chaotically. Cosmic radiation flooded the atmosphere. The ozone layer thinned. Weather patterns shifted violently. Neanderthals disappeared from Europe. Giant animals vanished from Australia. Modern humans retreated into caves and painted their walls with images of a world transformed.

Seven hundred eighty thousand years have passed since the last complete magnetic reversal. The average interval is two hundred thousand to three hundred thousand years. By this measure, we are overdue by half a million years. The field has weakened by roughly nine percent over the past two hundred years. Some researchers estimate thirty percent over the past three thousand years.

What happens when the shield fails? What would a magnetic reversal do to satellites, power grids, and navigation systems? Could civilization survive? This documentary investigates the science of geomagnetic reversals, the evidence from ancient rocks and ice cores, the controversial theories of catastrophists and the growing concern among researchers watching the magnetic north pole accelerate across the Arctic. We separate fact from fiction, examine what the past tells us about potential futures . . . and ask the question that matters most: are we prepared for what comes next?