Bobby and the Old Professor Examining Mammoth Tusks, 1938 Year 1938 Month May Rights Held By Donated by the Ann Arbor News. © The Ann Arbor News. Copyright Copyright Protected Related Bobby and the Old Professor -Elephant Tusks - They Talk About Fireflies and Metals Bobby and the Old Professor Photo Subjects University of Michigan Museum of Paleontology (UMMP) University of Michigan - Museums Paleontology Bobby and the Old Professor Elephants Bobby and the Old Professor Old News Ann Arbor News William Henry Butts Russell Ray Baker Eck Stanger