A scientist of international renown, Emilio Del Giudice wrote more than 100 scientific publications, which are very popular around the world. In Italy he was a researcher at the Istituto Nazionale di Fisica Nucleare di Milano (INFN - National Institute of Nuclear Physics of Milan) until 1st December 2006 when he retired. Among his better known studies there are his studies of water and the memory of water, on the dangers of "electro-smog" and the electro-magnetic fields, cold fusion and the Quantum Electro-Dymanics (QED). From 1969 to 1972 he worked at the MIT in Cambridge (USA) and from 1974 to 1976 at the Niels Bohr Institute in Copenhagen.