Picture yourself standing at the Geographic North Pole with a compass in your hand. You'd expect that trusty needle to point straight down, right into the ground. Turns out that's completely wrong.

Earth’s magnetic shield is shifting in dramatic ways. New data from ESA’s Swarm satellites show that the South Atlantic Anomaly — a vast weak spot in Earth’s magnetic field — has grown by nearly half ...

The European Space Agency's Swarm mission detected a large but temporary spike of high-energy protons at Earth's poles during a geomagnetic storm in November. It did this not with the scientific ...

Add Yahoo as a preferred source to see more of our stories on Google. The Earth's magnetic field deflects particles emitted by the Sun. Mark Garlick/Science Photo Library via Getty Images The Earth’s ...