Science student Kyle Walsh analyzes samples collected in a cave in Croatia, looking for undiscovered lifeforms. Credit: Penn State Expand Student Scott Slick holding a chickadee as part of avian research Credit: Penn State Expand Assistant Professor of Biology Dr. David Byman demonstrating internal human anatomy on a detailed model to his students. Credit: Penn State Expand Dr. Jiyoung Jung, Assistant Professor of Chemistry, performs an experiment for her class. Credit: Penn State Expand