Professor Loeb received a PhD in plasma physics at age 24 from the Hebrew University of Jerusalem (1986) and was subsequently a long-term member at the Institute for Advanced Study in Princeton (1988-1993), where he started to work in theoretical astrophysics. In 1993 he moved to Harvard University where he was tenured three years later.  He is now the Frank B. Baird Jr. Professor of Science and former chair of the department.