subfossil trees (IMAGE) Ural Federal University Caption The researchers set slices of the tree trunks up to dry Credit Vladimir Kukarskih Usage Restrictions Photo may be freely used to illustrate this topic, but please credit the author of the image: Vladimir Kukarskih License Original 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.