The E(38) is a new nuclear particle that has not been discovered before because of its very small interaction with normal matter. However it has been spotted in high-energy energy processes since at such energies also heavy fundamental particles, like the top quark, play their role. http://www.dn.pt/inicio/ciencia/interior.aspx?content_id=2373090 The portuguese cientist who suspected the existence of such light fundamental particle for three decades, found in the past already several miniscule signs of it in experimental data which were obtained at large acellerator laboratories and published in cientific journals. Recently, he discovered a clear sign of the E(38) in data obtained by the COMPASS Collaboration at CERN. Although little more is known by now than that it exists, he predicts that it is a kind of glue bubble, a miniature soap bubble. The E(38) might explain the discrepancy in the size of the proton radius between muonic and electronic data, as the E(38) interacts stronger with strange quarks than with the light quarks. When there exists a stable form of the E(38), then it might even be a source of clean nuclear fuel, because at desintegration it deposits all its heat and does not leave any deposit. Such fuel could play a role in traveling through space for the exploration of new continents at distant planets. But, first its properties should be established in dedicated experiments.