  We elaborate on the link relating gravitational radiation, vorticity and a
flux of super-energy on the plane orthogonal to the vorticity vector. We
examine the vorticity appearing in the congruence of observers at the outside
of the source, as well as the vorticity of the fluid distribution, the source
of the gravitational radiation is made of. The information provided by the
study of the physical aspects of the source poses new questions which could, in
principle, be solved by the observational evidence. Besides the study of the
theoretical issues associated to such relationship, we also stress the new
observational possibilities to detect gravitational radiation, appearing as
consequence of the above mentioned link. The high degree of development
achieved in the gyroscope technology, as well as recent proposals to detect
rotations by means of ring lasers, atom interferometers, atom lasers and
anomalous spin-precession experiments, lead us to believe that an alternative
to the laser interferometers used so far to detect gravitational waves, may be
implemented based on the detection of the vorticity associated with
gravitational radiation. Additionally, this kind of detectors might be able to
elucidate the open question about the physical properties of the tail of the
waves appearing as the consequence of the violation of the Huygens's principle
in general relativity.
