Staff researcher at CNRS (France) in 1972-2013. Now leading the Cosmology Laboratory of the John Naisbitt University (Belgrade and Paris). For my work since 1995, see : http://arxiv.org/find/grp_physics/1/au:+Gonzalez_Mestres/0/1/0/all/0/1 . I worked on theoretical strong-interaction particle Physics, including string and preon models, during the 1970's and the early 1980's. During the 1980's, I was with other colleagues at the origin of the cross-disciplinary work on neutrino and dark matter detectors. See, for instance : http://arxiv.org/abs/hep-ex/9905042 and references therein. Since the mid 1990's, I am working on possible tests of fundamental principles. I have been at the origin of the superbradyon hypothesis and explored the use of ultra-high-energy cosmic rays to test the fundamental principles of Physics. See : http://arxiv.org/abs/astro-ph/9505117 , http://arxiv.org/abs/physics/9704017 and, for a review, http://arxiv.org/abs/1011.4889 . A review on more recent work, including the spinorial space-time and its potential role in Cosmology and pre-Big Bang patterns is now in preparation. The photograph is the front page of the Giordano Bruno Mnemotecnica, available for instance from Wikipedia with Creative Commons license.