Marshall received his bachelor's degree with honors in mathematics, geology, zoology, physical chemistry and paleontology from the Australian National University.
He received his Ph.D. in paleontology, evolutionary biology and molecular evolution from the University of Chicago and had post-doctoral training at Indiana University.
Marshall said he is still adjusting to his new assignment and is ready for his teaching duties to begin. He is looking forward to the spring term and plans to stay here indefinitely.
"Professor Marshall is a young, energetic, excellent teacher who has a lot of good things to add to Harvard," McElroy said.