Human Footprints (image) eLife Share Print E-Mail Caption These are ancient human footprints impressed on different surfaces in the cave of Bàsura. Credit Marco Avanzini Usage Restrictions This image is free to be reused, as long as it is credited appropriately. Share Print E-Mail 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.