[math-fun] inner core of earth

http://news.illinois.edu/news/15/0209innercore_XiaodongSong.html http://www.nature.com/ngeo/journal/vaop/ncurrent/full/ngeo2354.html Allegedly the earth has an inner core inside its core. -- Warren D. Smith http://RangeVoting.org <-- add your endorsement (by clicking "endorse" as 1st step)