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Science & Technology

Earth's inner core has its own inner core

By T.K. Randall
February 10, 2015 · Comment icon 24 comments



There is still much to learn about the inside of the Earth. Image Credit: CC BY-SA 3.0 NikoLang
Scientists have discovered that there is another core nestled deep within the inner core of our planet.
Despite being situated directly beneath our feet, there is still a great deal that we don't know about the inside of the Earth.

Its interior structure is thought to be composed of the crust, the mantle, the outer core and inner core. Jules Verne's famous novel "Journey to the Center of the Earth" portrayed the inside of the planet as a huge cavern containing a vast ocean, however in reality the inner core is a solid ball of metal - a hellish place where the temperatures are the same as those on the surface of the sun.
Now scientists from the US and China have added a whole new chapter to our understanding of the planet's interior by revealing that the inner core actually contains an even smaller inner core of its own which is made up of a different type of iron crystals than those in the inner core's outer shell.

"The fact that we have two regions that are distinctly different may tell us something about how the inner core has been evolving," said Professor Xiadong Song from the University of Illinois.

"It may tell us about how our planet formed, its history, and other dynamic processes of the Earth."

Source: Washington Post | Comments (24)


Recent comments on this story
Comment icon #15 Posted by Hellfest1985 8 years ago
@ socrates So is the hollow earth theory a possibily ?
Comment icon #16 Posted by Junior Chubb 8 years ago
I thought it was common knowledge that the core of the Earth's core is made of nougat...
Comment icon #17 Posted by socrates.junior 8 years ago
@ socrates So is the hollow earth theory a possibily ? Not according to current evidence, no. Sorry.
Comment icon #18 Posted by third_eye 8 years ago
I bet there's more inner cores in this inner core of the earth's inner core ~
Comment icon #19 Posted by Junior Chubb 8 years ago
I bet there's more inner cores in this inner core of the earth's inner core ~ An inner core in a inner core?
Comment icon #20 Posted by third_eye 8 years ago
An inner core in a inner core? As long as it correlates with available data of course , the cores I mean ... or the inner cores to be exact ~ I think ...
Comment icon #21 Posted by qxcontinuum 8 years ago
another scientific bs...
Comment icon #22 Posted by socrates.junior 8 years ago
another scientific bs... Nah, man, you don't mean that.
Comment icon #23 Posted by Harte 8 years ago
Earth's inner core has its own inner core Probably some Russian plot. Harte
Comment icon #24 Posted by socrates.junior 8 years ago
Yeah, at this point we've got the crust, upper mantle, lower mantle, D'' layer, outer core, inner core, inner inner core...those Russians should get busy carving. Or just stop with their math and seismic analysis.


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