earth's core

The Age of Our Planet’s Inner Core Has Been Determined

Approximately 4.5-billion-years ago, Earth's liquid iron core cooled enough to create a solid ball in the center. Now, our planet's core comprises a solid iron inner core enclosed by a molten iron outer core. Telling exactly when this change happened...

Iron Experiments May Help Scientists Learn More About the Properties of Earth and Other Planets

Iron is the most stable and heavy chemical element generated by nucleosynthesis in stars, which automatically means it is the most plentiful heavy element in the Universe and in Earth’s core, as well as in the nucleus of other rocky...