Constraints placed by the uranium–lead isotopic system on the timing of core formation have long been discussed 6. More recently, the hafnium–tungsten isotopic dating system has been exploited and ...

An international collaboration including researchers from Lawrence Livermore National Laboratory has discovered that the Earth’s core formed under more oxidizing condition’s than previously proposed.

We know more about the surfaces of other planets than we do about what's inside our own. No drill has ever penetrated Earth's crust, which averages 25 miles thick beneath the continents. So, virtually ...