Superluminal waves and objects: An up-dated overview of the relevant experiments

After a brief theoretical introduction (based on the standard postulates of Special Relativity, and therefore extending it --or rather non-restricting it-- without any violations: in particular without any violations of the so-called Einstein causality), the main aim of this article is an updated presentation of the status-of-the-art of the "superluminal" experiments. In particular, we devote such an article to the phenomena met in tunneling through quantum (and classical) barriers [e.g., referring to the Genelalized Hartman Effect]; and in connection with the Localized (nondiffracting) Solutions of the wave equations [e.g., of Maxwell equations]: especially of the "X-shaped" ones. The interested reader is provided with an extended Bibliography. This paper was written as a homage to E.C.G. Sudarshan, in connection with his pioneering work on the so-called "tachyons". Actually, E.C.George Sudarshan, besides the originator of the V-A theory for weak-forces, of quantum optics --the quantum representation of coherent light--, of dynamical maps for open quantum systems, of the Zeno effect, etc., was a pioneer, in the sisties, also of the theory of Tachyons.