LONDON — The inner core of Earth may have changed shape in the past 20 years, according to a group of scientists.The inner core is usually thought to be shaped like a ball, but its edges may actuallyLONDON — The inner core of Earth may have changed shape in the past 20 years, according to a group of scientists.The inner core is usually thought to be shaped like a ball, but its edges may actually
Earth’s inner core may have changed shape, say scientists
