Brandenburg Gate (IMAGE) Helmholtz Association Caption The imaged Brandenburg Gate is only a few micrometers in size. The scientists took the green and red pictures of the model merely 50 femtoseconds apart. Credit HZB/Eisebitt Usage Restrictions only use for illustration this press release infos 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.