Scientists suggest Earth's inner core may have changed shape over the past 20 years, potentially affecting the planet's magnetic field, based on seismic wave analysis.

Scientists have discovered that Earth's inner core, previously thought to be solid and unchanging, has experienced significant shape changes over the past 20 years. Through advanced seismic analysis,

Researchers studying decades of earthquake data say they have found the first evidence that, in addition to spinning backward, Earth’s inner core in changing shape.