Robert Coriell

Is the Earth's core lopsided?

Model of how Earth’s inner core froze into solid iron implies it may be only 500 million years old For reasons unknown, Earth’s solid-iron inner core is growing faster on one side than the other, and it has been ever since it started to freeze out from molten iron more than half a billion years ago, according to a new study by seismologists at the University of California, Berkeley.