Thomas Humphrey is a physicist, teacher, exhibit developer, artist, and guitar player with a Ph.D. in elementary particle physics from Caltech. His research was done at Fermilab. Thomas joined the Exploratorium staff in 1973 and worked closely for many years with Frank Oppenheimer, the museum’s founder and director. An Exploratorium Senior Scientist, Thomas has been principal investigator on dozens of projects involving exhibit development and teaching in the areas of seeing, listening, physics, feedback, mathematics, and navigation. He’s also been involved with exhibits developed through our artist-in-residence program, and he’s tested innovative exhibit techniques.
Project Director, Senior Science Writer, and Associate Curator
Hugh McDonald is a Project Director, Senior Science Writer, and Associate Curator for the museum’s West Gallery, which focuses on the interplay among science, society, and culture. He is the Principal Investigator of Science of Sharing, an NSF-funded initiative to develop exhibits that let visitors experiment with resource-sharing and collaborative problem-solving, link their experiences to larger societal issues such as climate change and environmental destruction, and learn about the scientific study of human behavior. Hugh was the lead writer/editor for the museum’s Mind and Seeing exhibit collections and the Pirelli Award–winning Global Climate Change: Research Explorer microsite, and contributing writer/editor for numerous other exhibitions, sites, and publications. He received his doctorate in social psychology from Indiana University in 1997.
Isabel Hawkins is an astronomer and educator with a Ph.D. in astronomy from UCLA, and she spent 20 years as a researcher and science educator at the University of California, Berkeley, Space Sciences Laboratory. While at Berkeley, she consulted on several astronomy projects at the Exploratorium and was the bilingual (Spanish/English) host of the museum’s live webcast from Chichén Itzá, Yucatán, on Maya astronomy in 2005. She joined the Exploratorium staff in 2009, and became the project director for the Never Lost: Polynesian Navigation website. Isabel has published more than 100 articles on a variety of astronomy and education topics, and in 2009 she received the Astronomical Society of the Pacific’s Klumpke-Roberts award for her work in astronomy education and public outreach. Her interests include salsa dancing, yoga, drawing Maya classic period glyphs, and the study of native languages.
Director, Living Systems Department
Kristina Yu is the Director of the Exploratorium’s Living Systems Department. In this position, she oversees the biology laboratory and the staff who support the Exploratorium’s unique collection of life sciences exhibits, and she has curatorial oversight over the collection. The laboratory includes the Microscope Imaging Station (MIS), a facility that allows museum visitors to control research-grade microscopes to explore living biological samples and provides high quality imagery for educators. Kristina also collaborates with researchers in the San Francisco Bay Area, and she is building an archive of microscopic movies and images that are available on the Web. She earned a Ph.D. in molecular, cellular, and developmental biology from the University of California, Santa Cruz. Kristina spent her childhood on her parents’ organic pear farm in rural northern California.
Jennifer Frazier is a cell biologist whose current obsessions include plankton and data visualization. Jennifer has been at the Exploratorium since 2004, focusing on finding new ways to help visitors explore worlds they normally can’t see. Her projects include the Microscope Imaging Station and the Nanoscale Informal Science Education Network’s Visualization Laboratory. Before joining the Exploratorium, she created exhibits, multimedia, and documentary films at NOVA, the National Academy of Sciences, and several multimedia companies. Jennifer received her Ph.D. in cell biology from the University of California, San Francisco, where as an NSF and AAAS Fellow she used advanced imaging techniques to study polymer assembly during cell division. She has a B.S. in bioethics and genetics from the University of California, Davis.
Sebastian Martin grew up in a small town in Germany with a rich tradition in toy making, and he attributes his interest in learning through experimentation and play to this early experience. Before coming to the United States, he studied earthquakes in the Chilean Andes, satellite imaging in the boreal forests of Ontario, and physics and math in Erlangen, Germany. He earned a Ph.D. in geophysics from the University of Potsdam. Throughout his studies, he retained a playful approach to science and research, and he developed interactive exhibits at Phenomenta, a science center dedicated to inquiry and direct contact with phenomena. In 2005 he joined the Exploratorium, where he found a happy symbiosis among science teaching, playing, and making things. An exhibit developer at the museum, Sebastian also enjoys teaching physics and interactive design at the University of California, Berkeley, and Stanford University.
Associate Executive Director and Director of Laboratory
Robert Semper, Associate Executive Director and Director of Laboratory, coordinates the museum’s overall content-related R&D development and manages the institution’s relations with the external science, education, and funding communities. His areas of responsibility include the museum’s science and art development, public understanding of research activities, and creative application development. He provides oversight for the Museum Experience, and has also guided the development of the award-winning Exploratorium website. Rob is the author of many journal articles and invited papers, and he has been the principal investigator on projects that include developing new Internet resources, experiments using technology to enhance the museum visitor experience, and programs for teachers and museum educators. Awards include AAAS Fellow, 2006, and the NSTA 2006 Faraday Science Communicator Award. Before joining the Exploratorium in 1977, Rob taught physics and conducted solid state and nuclear physics research. He received his PhD in solid state physics from the Johns Hopkins University.
Paul Doherty graduated from the Massachusetts Institute of Technology with a PhD in physics. He was a tenured professor of physics for twelve years at Oakland University, Michigan, where he taught courses ranging from physics, astronomy, and geology to electronics, computer programming, and meteorology. In 1986 he came to the Exploratorium Teacher Institute, where he develops and teaches workshops and publishes them on his webpage. He is the author of many books, including the Explorabook, The Exploratorium Science Snackbook, the Klutz Book of Magnetic Magic, Color of Nature, and Traces of Time. Paul was given the Faraday Science Communicator award by the NSTA and chosen as the “Best Science Demonstrator” at the World Congress of Museums in Helsinki in 1996. He plays music on the whirly—a corrugated plastic tube. He is also a rock climber, and has climbed the face of El Capitan as well as making the first ascent of a 20,000-foot peak in the Sierra Nevada de Lagunas Bravas in the Andes.
Julie Yu is a staff scientist and Director of the museum’s Teacher Institute, where she works with teachers to create hands-on activities for teaching math and science. With a broad interest in all sciences, she has a PhD in chemical engineering from the University of California, Berkeley, with a minor in molecular and cell biology. Since joining the Exploratorium, she has developed ways to do numerous science activities (from making batteries to gel electrophoresis) at a fraction of their typical cost. When not in the classroom, Julie is usually doing science in her kitchen, pursuing a tender roast or the perfect soufflé.