I've been promising a Hopf fibration for a logo for years. Suddenly two samples
have appeared. The lower left figure was created by Ken Shoemake. For
an explanation of the picture, here's Ken's original post to me.
(details of picture) or
(Large TIFF version of picture).
The lower right figure is actually an associated fibration, the
fibration SO(3)--> S^2. This art appears on the cover of the AMS Notices, May 19
I need to check its copyright status. There is further information about
its details in the Notices issue. Cover story