!!!! Earth's inner core extras

==== Wikipedia

https://en.wikipedia.org/wiki/Earth%27s_inner_core @@   Earth%27s_inner_core
https://en.wikipedia.org/wiki/Structure_of_the_Earth#Core @@   Structure_of_the_Earth#Core

==== References

https://www.sciencedirect.com/science/article/pii/S0012821X01005684 @@   Alfè 2002 composition and temperature
http://science.sciencemag.org/content/340/6131/464 @@   Anzellini 2013 Iron MP with fast Xray
https://www.sciencedirect.com/science/article/pii/0031920181900467 @@   Dziewonski 1981 Earth Model
https://www.nature.com/articles/nature11031 @@   Pozzo 2012 Thermal Electrical cond
https://www.nature.com/articles/nature17957 @@   Ohta 2016 Exp Electrical cond
https://www.nature.com/articles/nature18009 @@   Zuzana Konôpková 2016 thermal cond.
https://www.nature.com/articles/nature15523 @@   Biggin 2015 Paleomag
https://www.nature.com/articles/nature15523 @@   Buffett 2010 Tidal dissip mag field
https://www.sciencedirect.com/science/article/pii/S0031920111000926 @@   Smirnov paleomag 2 billion
https://www.sciencedirect.com/science/article/pii/S0031920113001052 @@   Gomi 2013 high conduc iron
https://www.sciencedirect.com/science/article/pii/S0031920115000175 @@   Labrosse 2015 Thermal ev high cond
https://www.sciencedirect.com/science/article/pii/S0012821X01003879 @@   Labrosse 2001 Age of core