Edgar Weckert of DESY in Germany will present the next [email protected] talk on Tuesday, Jan. 29, in Building 15-253. His lecture is titled “Photon Science at DESY: Structure and Dynamics of Matter in the Light of Brilliant Synchrotrons and FELs.” Weckert is a leading expert on structural studies using x-rays. He will discuss the latest scientific and technical developments at the DESY photon sources, including PETRA and FLASH. Weckert will also discuss the new laboratory environment being established around these sources at DESY. The event will be webcast live.