Ross Staines (IMAGE) University of Queensland Caption Ross Staines measuring the footprints 4.5 metres above the cave floor (c. 1954). Credit Anthony Romilio Usage Restrictions Must only be used with this story. Must be credited. 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.