Peter S PershanPeter S. Pershan is Frank B. Baird, Jr Professor of Science in the Physics Department and the School of Engineering and Applied Science at Harvard University. In the early 1980s he helped produce the first synchrotron x-ray reflectometer for the stud of the horizontal liquid surface. He has since led the liquid surface field in exploration of such diverse liquid surfaces as superfluid helium, water and liquid metals. Read More Read Less