Ettore MAJORANA (1906-) catanese Physicist of international reputation. Student of and. Firm; was theoretical physical university professor to the university of Naples (1937). Scomparve mysteriously in 1938 in the course of a travel for sea from Palermo to Naples. A lot is its surveyings of important theoretical nuclear physics: under its name; associated to that of W. Heisenberg; goes a theory of the nuclear forces that gives explanation of the stability of the nucleus.