NASA detects a massive anomaly deep under Earth—and it’s spreading fast

NASA detects a massive anomaly deep under Earth and it’s spreading fast

A mysterious weak spot in Earth’s magnetic field is growing larger and more complex, and scientists at NASA say it could pose increasing risks to satellites, spacecraft, and even our understanding of the planet itself. Known as the South Atlantic Anomaly (SAA), this phenomenon stretches over South America and the South Atlantic Ocean, and it’s evolving in ways that researchers describe as both fascinating and alarming.

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