During the 30 years of space exploration, important discoveries in the
near-earth environment such as the Van Allen belts, the plasmapause, the
magnetotail and the bow shock, to name a few, have been made. Coupling
between the solar wind and the magnetosphere and energy transfer
processes between them are being identified. Space physics is clearly
approaching a new era, where the emphasis is being shifted from
discoveries to understanding. One way of identifying the new direction
may be found in the recent contribution of atmospheric science and
oceanography to the development of fluid dynamics. Hydrodynamics is a
branch of classical physics in which important discoveries have been
made in the era of Rayleigh, Taylor, Kelvin and Helmholtz. However,
recent progress in global measurements using man-made satellites and in
large scale computer simulations carried out by scientists in the fields
of atmospheric science and oceanography have created new activities in
hydrodynamics and produced important new discoveries, such as chaos and
strange attractors, localized nonlinear vortices and solitons. As space
physics approaches the new era, there should be no reason why space
scientists cannot contribute, in a similar manner, to fundamental
discoveries in plasma physics in the course of understanding dynamical
processes in space plasmas.