2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/111803An account is given of some topical unpublished work by Ettore Majorana, revealing his very deep intuitions and skilfulness in Theoretical Physics. The relevance of the quite unknown results obtained by him is pointed out as well.latex, 23 pages, 1 figure; review article to be published in the special issue of EJTP dedicated to the centenary of the birth of Ettore MajoranaHistory and Philosophy of PhysicsHigh Energy Physics - PhenomenologyHigh Energy Physics - TheoryGeneral PhysicsPopular PhysicsFour variations on Theoretical Physics by Ettore Majoranatext