Three-Dimensional Reconstruction (IMAGE) Proceedings of the National Academy of Sciences Caption Three-dimensional reconstruction of a 7-day-old chicken embryo imaged by nano-computed tomography. Credit Image courtesy of Rui Tahara and Nicholas Lin 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.