Varies by program

Multiple programs support pre- and postdoctoral scholars working on the ancient Greek world. 

Multiple postdoctoral fellowships support research in astronomy, astrophysics, and earth, planetary and space sciences and make available the combined resources of the Smithsonian Astrophysical Observatory and the Harvard College Observatory.

Multiple programs support US citizens in teaching, conducting research, and carrying out professional projects around the world.

Multiple programs support noncommercial postdoctoral research for projects leading to academic publication.

Multiple programs provide research training and fellowship support to postdoctoral and clinical research fellows undertaking cancer research projects under mentorship.