Advanced Imaging (IMAGE) California Institute of Technology Caption Three‑dimensional live imaging of zebrafish (upper panel) and fruit fly (lower panel) embryos with two‑photon light sheet microscopy. The upper panel shows not only the embryo's tissue (in white) but also green fluorescent protein driven by a gene‑specific promoter (in orange). The lower panel shows the individual cell nuclei of the fruit fly embryo, labeled with green fluorescent protein, imaged at different time points during its embryonic development. Credit Willy Supatto, Seth Ruffins, Thai Truong / Caltech Usage Restrictions Okay with credit. 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.