Earth’s solid inner core, about the size of Pluto, has remained enigmatic since its discovery nearly 100 years ago. Scientists are probing its secrets—and learning how it might have saved life on Earth. Learn more on #EarthDay: https://fcld.ly/d3uvfwr | Science

Is the earth's inner core slowing down and possibly reversing in spin? It sounds like the plot of a blockbuster doomsday sci-fi movie but this is real science. Scientists at Beijing University believe the core of the earth might soon reverse direction. I appeared on CNN's CNN This Morning to discuss these findings and help separate fact from fiction. Watch here now. | Dr. Michio Kaku