Charcoal with wood structure (IMAGE) Geological Society of America Caption Charcoal with wood structure preserved on which it is possible to recognize the type of a tree killed by an asteroid. Image under Scanning Electron Microscope (by Ania Losiak). Credit Ania Losiak Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. License CC BY-NC 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.