And sometimes they go back scores of years in time just to think about things in a new series or a new direction, as here:

Title: A speech for the luminiferous ether
Authors: Norbert Feist
Comments: 20 pages in German, inclusive of 15 figures
Subj-class: General Physics
\\
  There is no aberration of terrestrial sources, because the light-vector has
an inertial component. A new analysis of the Michelson Morley experiment shows:
Light propagates anisotropically relative to a moving system, dependent on the
velocity and the angle between the velocity and the direction of motion. The
two way (back and forth) velocity is isotropic, but also dependent on the
velocity of the frame. There is no Lorentz contraction. - A real ultrasonic
experiment shows: Also the propagation of sound follows the given general
conical section equation and an acoustical Michelson Morley experiment gives
the same zero result as the optical experiment in contrast to the school of
thought. - The theory of relativity is incorrect and the existence of a
luminiferous ether as a propagation medium and an absolute frame of reference
is again obvious. Some properties of the ether and a fundamental cause of the
dependency of the velocity on the mass and the frequency are presented.
\\ ( http://arXiv.org/abs/physics/0104047 ,  184kb)