partnership science advisor dr. David gala talks about an ecological history of the Missouri River and 21st century challenges in the Big Muddy this event is free and open to the public you do not need to register to attend and then on January 28th on the Washington University Medical School campus and as part of our teen science cafe series radiology and biomedical engineering professor dr. Susan Lackey talks about nanotechnology in the science of the small teen science cafes are open to all students in grades 6 through 12 they are