Why Earth's Outer Core is liquid and Inner Core is Solid? The liquid iron and nickel in the outer core move around soild inner core like a dynamo, creating Earth's magnetic field. This geomagnetic force protects us from harmful solar radiation and guides navigation. #Geoscience #EarthScience #InstaScience #upsc #reelsinstagram | Rohan Tyagi

7K views · 152 reactions | One of the more bizarre features of our planet is that within its molten iron core there is an enormous rotating crystal ball the size of the moon. Not weird enough for you? Consider this: that crystallized iron ball is hotter than the surface of the sun, yet it resists melting. A new study from KTH may finally settle a longstanding debate over how that's possible. | KTH Royal Institute of Technology | Facebook