He specializes in photomicroscopy and macro photography. He is a fellow of the Biocommunications Association and his work appears in textbooks, journals and museums worldwide. His work is in the permanent collections of more than thirty museums including The Smithsonian, The George Eastman House, The American Museum of Natural History and The Science Museum in London. He has just co-authored a new book entitled Seaweeds: Wonders of the Ocean Realm and the exhibit will open at The Charleston Museum in November and runs thru April 2007. He can be contacted at nbarker@jhmi.edu.