  In 1965, I published a paper, exhibiting a hitherto unknown limit of the
Lorentz group, which I christened Carroll group because of its seemingly
paradoxical physical contents. Since I saw it as more curious than relevant, I
published it in French in a journal somewhat afar from the mainstream of
theoretical physics at that time. It was most gratifying to witness the quite
unexpected favour this paper started to enjoy half a century later, so much
that a so-called Carrollian physics is now developing, with applications in
various domains of forefront theoretical physics, such as quantum gravitation,
supersymmetry, string theory, etc. I offer this narrative as an example of the
very diverse time scales with which scientific ideas may develop (or not).
