WORLD

Scientists detect shape-shifting along Earth’s solid inner core

Kenneth Chang of The New York Times, Published on 11/02/2025

» NEW YORK - The inner core at the centre of the Earth, a ball of iron and nickel about 1,500 miles (2,400 kilometres) wide, may not be perfectly solid. A new study finds evidence that the inner core’s outer boundary has noticeably changed shape over the past few decades.