RGGS Comparative Biology Ph.D. Program students are making important discoveries thanks to new fossil and molecular evidence, cutting edge technologies, and the mentorship of the RGGS faculty. Their analyses have implications for the Tree of Life, biodiversity and conservation, disease prevention and control, and more. They are a remarkably accomplished group, regularly earning prestigious awards, prizes, and grants, and securing notable positions upon graduation. They hail from all across the U.S. and from many other countries. The Program's annual enrollment is generally 18 students, half of whom are women.