Earth's Inner Core (IMAGE) University of Liverpool Caption New data indicates that the Earth's inner core was formed 1 -- 1.5billion years ago. Credit Kay Lancaster, University of Liverpool Usage Restrictions The image must be credited to Kay Lancaster, University of Liverpool License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.