This work is written to provide a qualitative introduction, appropriate for a general science audience, to the application of pragmagnetic resonance to the determination of biomolecular dynamics. The work is also intended as a reference resource for those pursuing or contemplating research in the hydrodynamics. The work is also intended as a reference resource for those pursuing or contemplating research in the hydrodynamic characterization of components of Biosystems. Thus, the Introduction, Theory, and Methodology sections involve presentations at two levels ? a pictorial and intuitive presentation for the generalist and a quantitative presentation for the specialist. The sections on applications provide a critical discussion of both pure and applied research applications which yields insights into both the capabilities and limitations of the methodology. The applications sections are also of interest from the standpoint of the detailed characterization of certain Biosystems, such as erythrocytes, which have evolved from EPR measurements.