Scientists find oddly behaving ‘inner-inner core’ at Earth’s center

0Though the seismic waves from earthquakes are best known for their destructive capabilities, in the hands of geologists, they can be powerful tools of discovery. A research team at the University of Illinois has just used the rumbles from quakes to more closely examine the inner core of our planet, and what they found there was quite a surprise. It seems there’s another core inside the inner core that measures about half its diameter. What demarcates this “inner-inner core” is that the iron crystals it contains are oriented on an east-west axis, unlike the iron crystals in the “outer-inner core” which organize along a north-south axis. Read Full Article