The Earth's iron core isn't just a solid mass Ifeadi C. 10:31 Mashable, Zero Tech Blog A new study by physicists discovers that the Earth's dense inner core is made up of constantly switching iron atoms. via Zero Tech Blog Share this Share on FacebookTweet on TwitterPlus on Google+ Related PostsWhere to mobilize if you want to see Trump crumble in 20185 books about immigrant and refugee experiences that you'll want to read with your kidsWeekend activity inspo: Shooting arrows into Silly StringWoman's Tinder profile pic prompts fierce toilet paper debateMaster Google Analytics with this $10 online courseDrake's latest album has already sparked a new dance challenge