Crane-fly 2 (IMAGE) Lund University Caption Cephalic region (head) of a 54-million-year-old crane-fly from the Fur Formation of Denmark, illustrating the regularly arranged hexagonal ommatidial facets of its compound eyes. Maximum width of eyes is approximately 1.25 mm. Credit Johan Lindgren Usage Restrictions None 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.