Four Degrees

seismology

A momentous discovery deep below: Earth’s inner core

For the Accretionary Wedge blog festival with the theme of ‘Momentous Discoveries in Geology’, Marion Ferrat discusses how a pioneering lady discovered what lies deepest inside our planet. We know a lot about our planet today:  its position in the solar system, its age, its composition and its internal workings and structure. Many laborious experiments, observations and hypotheses have helped scie ...[Read More]