The neutrino, the particle that might have made the universe

Neutrinos have a non-zero mass, this mass is infinitesimal but sufficient to allow them to transform from one type into another type. This oscillation process might suggest the existence of a new fundamental interaction that could tell neutrinos from anti-neutrinos and as a consequence might explain why matter overcame antimatter in the primordial universe. The existence of new types of neutrinos called sterile neutrinos (because they are even less interactive than the 3 known types of neutrinos) are postulated to explain a large part of the dark matter enigma. Primordial neutrinos, it means neutrinos that were produced just after the big-bang 13.7 milliard years ago, might be present in today's universe, they must be very numerous but little energetic which make their detection very difficult. These primordial neutrinos might have a role on the evolution and shaping of our universe. More than 20 neutrino detectors are operating throughout the world. (A.C.)