Earth's inner core is solid and blistering hot. For decades, scientists have known the inner core is solid thanks to the pioneering work of Danish seismologist Inge Lehmann, who first proposed its ...

Earth's inner core, the solid iron-rich mass at the center of our planet, is slowly growing as the surrounding molten outer core cools and freezes. But this process has been a source of debate amongst ...

Beneath our feet lies a hidden world as mysterious as space itself, the Earth’s core. This distant interior region, more than 3,000 miles (5,000 km) beneath the surface, is out of reach of instruments ...