Betsey Dexter Dyer is the Chair and Professor of Biology at Wheaton College. She was introduced to the microbes of the termite hindgut by Lynn Margulis in the autumn of 1976. Thereafter, she was a part of Lynn’s lab through 1984, when she earned her PhD. She is author of A Field Guide to Bacteria (Cornell University Press) and coauthor of Tracing the History of Eukaryotic Cells and coeditor of The Origin of Eukaryotic Cells, both with Robert Obar. Professor Dyer will lead the filmmakers on field trips to observe bacteria and share her enthusiasm for these important organisms.