Earth core

  • Researchers from the Chinese Academy of Sciences have found that Earth’s inner core may be stranger than we thought. Rather than a plain solid, new simulations suggest it exists as a superionic state of matter, partway between a liquid and a solid.
  • The extremely hot interior of Earth is slowly cooling down, but exactly how fast is unknown. By studying how well a common deep-Earth mineral conducts heat, researchers have now found that the planet’s interior may be cooling faster than expected.
  • NASA's InSight has provided … well, insight, into the inner workings of the Red Planet. By monitoring marsquakes over the past two years, the instrument measured the thickness and composition of Mars’ crust, mantle and core, revealing some surprises.
  • New evidence suggests that snow may be falling within the broiling hot core of planet Earth. Of course, this isn’t your everyday surface snow – these flakes would be made of iron, settling onto the solid inner core through the more fluid outer core.
  • The Earth is almost 4.5 billion years old, but it’s young at heart – literally. Researchers from the University of Rochester have now dated the solid inner core of the planet to just 565 million years, making it a relative toddler compared to the rest of Earth.
  • Science
    It’s long been thought that the Earth's inner core is a solid ball of iron, but direct evidence is hard to come by. Now, researchers from the Australian National University (ANU) have detected a type of seismic wave passing through the core that only propagates through solid objects.
  • Science
    Geologists estimate that the Earth’s core is a sweltering 5,700 K – and yet the inner core is a solid ball of iron. Why it doesn’t liquify is a bit of a mystery, but now a study puts forward a new theory, simulating how solid iron can remain atomically stable under such extreme conditions.
  • Science
    The ESA is studying the Earth’s magnetic field, and now the project has discovered the driving force behind why it's changing: wrapped around the outer core of the planet is a geological “jet stream” made of molten iron, which flows at tremendous speeds – and it’s getting faster.
  • Science
    The last reversal of Earth's magnetic field occurred some 786,000 years ago and was previously thought to have taken several thousand years but, if new research is correct, the real time it may take for the flip to occur could actually be closer to the span of a human life.